aluminium carbide on hydrolysis gives

As a result, the agglomerates formed by the reaction products became larger with the proceeding of hydrolysis, enveloping the unreacted AlN inside. Soc., 73 (1990) 724-728. Faraday Soc., 53 (1957) 1020-1027. These powders were produced through three major commercial approaches: chemical vapor deposition (CVD) from triethyl aluminum (powder A), carbothermal reduction and nitridation of alumina (powders B1 and B2), and direct nitridation of aluminum metal (powders C1 and C2). +6H 2. . 2. 29. This drying condition proved to be sufficient since after further heating at 160°C mass change was not observed. Am. Moya, “Effect of Oxygen Content on the Corrosion of AlN Powder in Diluted Acid Solution”, J. Eur. 4”, American Ceramic Society, Columbus, OH, US (1970). Sci., 28 (1993) 3709-3714. Chem. Aluminium Carbide 4. K. Watari, M. Kawamoto and K Ishizaki, “Sintering Chemical Reactions to Increase Thermal Conductivity of Aluminium Nitride”, J. L .M. It consists of a large community of people from a range of medical backgrounds from First Aiders within the workplace to Paramedics and surgeons. ALUMINUM CARBIDE, Al4C3. Sci.. K. Watari, K. Ishizaki and F. Tsuchiya, “Phonon Scattering and Thermal Conduction Mechanisms of Sintered Aluminium Nitride Ceramics”, J. Soc., 83 (2000) 1375-1378. = 18.33° and 18.56° were the strongest reflections of gibbsite ((002). Discover the Zetasizer Lab—the Entry-level particle size and zeta potential analyzer with enhanced capabilities. The beginning of the hydrolysis reaction is as follows: Al 3+ (aq) + 6H 2 O(l) <-> [Al(H 2 O) 6] 3+ (aq) Solubility of aluminum and aluminum compounds ZwickRoell manufactures a wide range of hardness testing machines for a variety of applications. hydrolysis of aluminium carbide gives methane gas Al4C3 + 12H2O ---> 3CH4 + Al(OH)3 The presence of this OH band in the spectra of starting powders was due to hydroxyl containing structures that commonly exist on the powder surface, as evidenced by TPDMS analysis [22, 29]. The existence of an induction period in the hydrolysis could be related to the surface structure of AlN powders. Mater. In contrast, degradation of AlN powders in ambient atmospheres at room temperature has been much less studied. Soc.. K. Wefers and C. Misra, “Oxides and Hydroxides of Aluminum, Alcoa Technical Paper No. The AlN powder produced by the carbothermal process shows the longest induction period. 12. K. Watari, K. Ishizaki and F. Tsuchiya, “Phonon Scattering and Thermal Conduction Mechanisms of Sintered Aluminium Nitride Ceramics”, J. Answer with step by step detailed solutions to question from MTG's BITSAT Power Guide, Hydrogen- "The carbide of which of the following metals on hydrolysis gives allylene or propyne?" Beryllium carbide is prepared by heating the elements beryllium and carbon at elevated temperatures (above 900°C). Many authors have reported bayerite to be a hydrolysis product of AlN powders in water and water-based solutions at room temperature [7, 8, 10, 11, 18]. Printed in Northern Ireland NOTES Hydrolysis of uranium, thorium and aluminum carbides in 020(1) (Received 14 February 1966) Most reactions involving the cleavage of a hydrogen bond in the rate-determining step show a marked change in the reaction rate when deuterium is substituted for hydrogen. C. Young and J. Duh, “Corrosion of Aluminum Nitride Substrates in Acid, Alkaline Conditions and Water”, J. H.B. Ring, “Degradation of Aluminum Nitride Powder in an Aqueous Environment”, J. calcium carbide products A Ca2C CaO and C2H4 6. R. K. Hart, “The Formation of Films on Aluminium Immersed in Water”, Trans. Alpha alumina powder was reported to give the maximum hydrogen evolution. Soc.. F. Barba, P. Ortega, J. Bermudo, M.I. Chem., 61 (1989) 2399-2402. Ishizaki, P. Raharjo, K. Sato and K. Ishizaki, “Mechanism of Hard Agglomerate Formation in a High Purity Sub-micron α-Alumina Powder”, J. Ceram. The time required to reach this value of mass change was used in this study as the measurement of the induction period, the values of which are shown in Figure 2. Am. Sealy, “The Thermal Stability of Aluminum Nitride”, J. You may need to download version 2.0 now from the Chrome Web Store. Sheppard, “Aluminum Nitride: A Versatile but Challenging Material”, Am. reported that the powders from the carbothermal process had better resistance to weathering, and attributed this to thicker surface oxide layer (after measurement of this layer using XPS), than the ones produced by direct nitridation [21]. Sci., 21 (1986) 1301-1304. 21. Soc. Mater. S. Fukumoto, T. Hookabe and H. Tsubakino, “Hydrolysis Behavior of Aluminum Nitride in Various Solutions”, J. Unfortunately, because AlN is unstable in a water-containing environment, oxygen contamination arises not only from the powder manufacturing process, but also from contact with water molecules in powder processing after manufacturing. Moya, “Effect of Oxygen Content on the Corrosion of AlN Powder in Diluted Acid Solution”, J. Eur. More info. In the hydrolysis each powder shows an induction period, which is attributed to slow hydrolysis of the surface oxide/oxyhydroxide layer. 2. Sci., 23 (1988) 1745-1747. Mass change of the AlN powders during hydrolysis in moist air. Figure 6: SEM observation of raw (a) and hydrolyzed powder A at Δm = 8.0% (b), 64.7% (c), and 89.7% (d). Which of the following gives propyne on hydrolysis. 3), or alpha alumina (α-Al. XRD analysis indicated that the crystallized phases obtained in the hydrolysis were the same for different powders and for the same powder at different. W. H. Gizten, “Alumina as a Ceramic Materials, Special Publication No. For each powder, after the mass change per unit surface area reached ~0.006 g/m2, the hydrolysis rate increased quickly. Y. Kameshima, S. Kuramochi, A. Yasumori and K. Okada, “Analysis of Surface State and Stability during Storage of AlN Powders by X-ray Photoelectron Spectroscopy”, J. Ceram. O. Sci.. Y. Kameshima, S. Kuramochi, A. Yasumori and K. Okada, “Analysis of Surface State and Stability during Storage of AlN Powders by X-ray Photoelectron Spectroscopy”, J. Ceram. K. P. Prodromou and A. S. Pavlatou-Ve, “Formation of Aluminum Hydroxides as Influenced by Aluminum Salts and Bases”, Clays and Clay Minerals, Ch. Ceram. Ishizaki and K. Ishizaki, “Temperature Programmed Desorption (TPD) Evaluation of Aluminum Nitride Powder Surfaces Produced by Different Manufacturing Proceses”, J. Ceram. The reflections of bayerite were unambiguously shown, but those of nordstrandite and gibbsite were not apparent due to overlapping. 1. Ceram. found a linear reaction rate without induction period [8], but, other researchers reported the existence of an induction period [10, 11]. < ~2%), but showed growth of the broad OH stretching band from 2540 - 3780 cm. Abid et al. Characteristics of the AlN Powders. Sci., 27 (1992) 2627-2630. The thermal conductivity of sintered AlN is greatly reduced by oxygen contamination in AlN grains, because oxygen occupation in AlN lattices generates vacancies that work as phonon scattering sites [1, 4-6]. The peaks at 2θ = 18.33° and 18.56° were the strongest reflections of gibbsite ((002), d = 4.85 Å) [24] and nordstrandite ((010), d = 4.79 Å) [24], respectively. Al 4 C 3 + 12H 2 O 3CH 4 +Al ... it gives a mixture of different compounds. Soc. Soc.. S. Fukumoto, T. Hookabe and H. Tsubakino, “Hydrolysis Behavior of Aluminum Nitride in Various Solutions”, J. In­ter­ac­tion of alu­minum ox­ide with car­bon at a tem­per­a­ture of 1800 °С. C 3. . At the beginning each powder underwent an induction period when the hydrolysis reaction was slow. Osendi and J.S. The small difference could be attributed to impurities, e.g., 0.37wt% oxygen, in the raw powder. 19, Revised”, Alcoa Laboratories, Aluminum Company of Amereica, Pittsburgh, US (1987). The powders from the carbothermal process showed the longest induction periods. Induction periods for the hydrolysis of AlN powders in moist air. Y. Li, T. Qiu and J. Xu, “Effect of Thermal Oxidation Treatment in Air on the Hydrolysis of AlN Powder”, Mater. Because XRD was not sensitive enough to surface change at the beginning of hydrolysis, DRIFT analysis was employed to detect this change. The value of Δm of powder A (89.7%) after 417 h of degradation was in good agreement with the calculated value (90.3% for complete conversion of pure AlN to Al(OH)3, the final product of the hydrolysis as will be described below). The authors thank the Ministry of Education, Culture, Sports, Science and Technology for financial support of this work through the 21st Century Center of Excellence (COE) Program. This study provided insight into the degradation phenomena of AlN powders during processing under normal atmospheric environmental conditions. The typical microstructural evolution of the AlN powders during hydrolysis is shown in Figures 6 (a) – (d). Because XRD was not sensitive enough to surface change at the beginning of hydrolysis, DRIFT analysis was employed to detect this change. The continuous and amorphous oxide/oxyhydroxide layer could protect the AlN against corrosion. Ishizaki and K. Ishizaki, “Characterization of AlN Powder Surface by Temperature Programmed Desorption Mass Spectrometry”, Interceram, 50 (2001) 366-372. Lett.. H.B. Ethanol Ans : 3. Aluminum ions in other compounds also hydrolyze, and this continues until the cationic charge has run out, ending the reaction by hydroxide formation. If the induction period is short enough, it may not be observed. Mater. Y1365. Carbide of Be – beryllium carbide (Be 2 C) and Al – aluminium carbide (Al 4 C 3) give methane on hydrolysis. XRD pattern for powder A after 417 h of hydrolysis (Cu Kα radiation; after removing reflections from Cu Kα2 radiation). Academic Partner. Accordingly, in our study amorphous AlOOH could be formed initially and transformed subsequently to Al(OH)3, i.e., AlOOH acted as an intermediate product in the hydrolysis. Mass changes of AlN powders during hydrolysis are shown in Figure 1. of powder A (89.7%) after 417 h of degradation was in good agreement with the calculated value (90.3% for complete conversion of pure AlN to Al(OH). Both beryllium and aluminium are rendered passive by nitric acid. XRD analysis indicated that the crystallized phases obtained in the hydrolysis were the same for different powders and for the same powder at different hydrolysis times. DRIFT spectrum of the same sample (Figure 4) showed OH stretching bands characteristic of these three polymorphs of Al(OH)3, as reported in the literature [24, 25]. found a linear reaction rate without induction period [8], but, other researchers reported the existence of an induction period [10, 11]. DRIFT spectra showing increase of the OH stretching band at the beginning of hydrolysis. 3. Figure 1. Res. Evidently the surfaces of the powders were hydrolyzed first. 22. To obtain low-oxygen, high-thermal conductivity AlN ceramics, the processes from AlN powder production to its sintering has been intensively studied. Education Franchise ... Aluminium carbide on hydrolysis gives methane gas. Furthermore, the hydrolysis of mixed metal carbides and nitrides is discussed, which gives a mixture of extremely interesting molecules that are considered the raw materials for the formation of the molecules of life: guanidine, methyl hydrazine, formic acid, hydrogen cyanide, urea, cyanamide, methylamine and … 27. Answer. Ceram. Zhang, “Surface Treatment and Hydrolysis Kinetics of Organic Films Coated on AlN Powder”, British Ceram. 2Al₂O₃ + 9C → Al₄C₃ + 6СО. Trans.. A. Abid, R. Bensalem and B.J. The hydrolysis behaviors of AlN powders and ceramics in water and water-based solutions have been investigated extensively. The characteristics of AlN powders studied are listed in Table 1. Ceram. 15. found that the surface of AlN powder produced by the carbothermal process was composed of a θ-alumina-like layer containing oxynitride, and those from CVD and direct nitridation were composed of a γ-alumina-like or boehmite-like layer and an oxygen-diffused layer [22, 23]. This paper was also published in print form in “Advances in Technology of Materials and Materials Processing”, 7[1] (2005) 37-42. The relative humidity around the samples was 80%. Beryllium carbide, or Be 2 C, is a metal carbide. Chemistry 26.A Metallic Carbide on treatment with water gives a colourless gas which burns readily in air and gives a red precipitate with Cu 2 Cl 2 +NH 4 OH When this re­ac­tion takes place, meth­ane and alu­minum hy­drox­ide are re­leased. CEO of Bcomp, Christian Fischer, talks to AZoM about an important involvement with Formula One's McLaren. Reflections from Kα2 radiation were removed by using software supplied with the diffractometer. ← … Am. where mt is the mass of the dried sample after hydrolysis for period t, and m0 the initial mass. 10. To the best of our knowledge, the presence of nordstrandite or bayerite-nordstrandite-gibbsite mixture in the hydrolysis products of AlN has not been reported. The existence of an induction period in the hydrolysis could be related to the surface structure of AlN powders. Sheppard, “Aluminum Nitride: A Versatile but Challenging Material”, Am. In electrolytic manufacturing of aluminum, aluminum carbide forms as a corrosion product of the graphite electrodes. The DRIFT spectra of samples without dilution were recorded by using a Shimadzu FTIR 8300 spectrometer (Shimadzu Corp., Japan) equipped with a Triglycine Sulfate detector, at a resolution of 4 cm-1. A representative XRD pattern obtained from powder A after 417 h of hydrolysis, achieving the highest conversion (Δm = 89.7%) among the five powders employed, is presented in Figure 3. Al 4 C 3 (s) + 12 H 2 O(l) → 4 Al(OH) 3 (s) + 3 CH 4 (g) If 0.315 mol Al 4 C 3 completely reacts with water in this manner, calculate the following. The peak at 2θ =18.79° was from bayerite ((001), d = 4.71 Å) [24]. The company has helped develop a natural fiber composite racing seat, echoing the racing and automotive industry's move towards more sustainable technologies. DRIFT spectra showing increase of the OH stretching band at the beginning of hydrolysis. X-ray diffraction (XRD) analysis indicated that the drying process did not change phase composition. Sci.. J. G. Highfield and P. Bowen, “Diffuse-Reflectance Fourier Transform Infrared Spectroscopic Studies of the Stability of Aluminum Nitride Powder in an Aqueous Environment”, Anal. High thermal conductivity is required for successful application of aluminum nitride (AlN) as a substrate material in electronic devices. (Ammonia gas was detected during the hydrolysis.) (2~ The reaction of aluminum carbide with water has been reported to give … Shan, Y. Zhu and Z.T. or own an. Your IP: 162.243.140.82 The mass increase was due to hydrolysis of AlN to form aluminum hydroxides, as will be analyzed below. Bull.. Y. Zhang and J. Binner, “Hydrolysis Process of a Surface Treated Aluminum Nitride Powder – A FTIR Study”, J. Masses of all powders increased with hydrolysis time. C3Al4. Bull., 69 (1990) 1801-1812. 2) could thus be attributed to their surface structure that was different from the other powders, as mentioned above. Another way to prevent getting this page in the future is to use Privacy Pass. 19. , demonstrating a better resistance of it to moisture attack due to the higher stability of its surface structure. hydrolysis of al4c3 - Chemistry - TopperLearning.com | sm4iyn44. Aluminum carbide (Al 4 C 3) and heterostructures thereof have implication for strong structural materials , , , . 26. Zhang, “Surface Treatment and Hydrolysis Kinetics of Organic Films Coated on AlN Powder”, British Ceram. A. Abid, R. Bensalem and B.J. asked Apr 19, 2019 in Chemistry by Simrank (72k points) p - block element; jee; Calcium carbide is readily hydrolysed by water giving two products only. During the hydrolysis, the powder samples were held above distilled water in a glass vessel at room temperature (20°C) under atmospheric pressure. Highfield, A. Mocellin and T.A. 5. Slack, R. A. Tanzill, R. O. Pohl and J. W. Vandersande, “The Intrinsic Thermal Conductivity of AlN”, J. Phys. The reaction between aluminium carbide and water takes place according to thefollowing equation: Al4C3 + 12 H2O 3CH4 + 4Al(OH)3 Calculate the volume of methane measured at STP, released from 14.4 g of aluminium carbide by excess water. The reason could be because, the length of the induction period varies for different powders (as shown in Figure 2) and experimental conditions. Lett., 21 (2002) 803-805. Questions of this type are frequently asked in competitive entrance exams like PHYSICAL PROPERTIES OF METHANE Methane is a colorless, odourless and non-poisonous gas. For instance, immersion of aluminum sheets in water at 20°C has resulted in an amorphous boehmite-like (AlOOH) layer which converted successively to crystalline boehmite and bayerite [30], and aging of aluminum surfaces at room temperature in air at 100% humidity have led to initial formation of an AlOOH type layer which consequently aged to give an Al(OH)3 type surface layer [31]. BY THE HYDROLYSIS OF ALUMINIUM CARBIDE: In laboratory methane can be prepared by boiling aliminium carbide with water. Y. Li, T. Qiu and J. Xu, “Effect of Thermal Oxidation Treatment in Air on the Hydrolysis of AlN Powder”, Mater. Mater. Methane can be prepared in the laboratory by reaction of aluminium carbide with water or strong acids. Owned and operated by AZoNetwork, © 2000-2020. The resultant DRIFT spectra did not indicate formation of crystalline aluminum hydroxides at the beginning of hydrolysis (Δm < ~2%), but showed growth of the broad OH stretching band from 2540 - 3780 cm-1 (Figure 5), suggesting increasing amorphous hydroxide on the surface. H. W. Marel and H. Beutelspacher, “Atlas of Infrared Spectroscopy of Clay Minerals and Their Admixtures”, Elsevier, Amsterdam, the Netherlands (1976). Solids. Since every step in the powder handling after manufacturing could influence the surface, powders from the same preparation method differed in the length of induction period. Mater. The hydrolysis rate is affected by the AlN characteristics and the solutions employed. Jpn., Int. 1299-86-1. Ed., 102 (1994) 299-302. Statement-1: Calcium carbide on hydrolysis gives ... Aluminium carbide on hydrolysis produces 1:09 15.6k LIKES. Al4. However, Kameshima et al. Aluminium carbide, however, reacts with water to give aluminium hydroxide ( Al (OH) 3 ) plus the well-known natural gas fuel, methane (CH 4 ). An aluminum mirror was employed to obtain the background spectra. ALUMINUM CARBIDE. With time increase the hydrolysis rate increased at first, and then gradually decreased. 1.2k SHARES. Table 1. Figure 4. Technically, yes, but carbides of hydrogen are … If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. TPDMS analysis indicated that, unlike powders produced by CVD and direct nitridation processes, the powder produced by the carbothermal process showed no desorption of NH3 [22], demonstrating a better resistance of it to moisture attack due to the higher stability of its surface structure. The hydrolysis behaviors of AlN powders and ceramics in water and water-based solutions have been investigated extensively. Jpn., 109 (2001) 16-22. Figure 3. G. A. Aluminum carbide,al4c3. . Am. The intersection of the anodic and cathodic curves gives the galvanic current density for a composite with 50% of exposed reinforcement area. High-purity AlN powders with low oxygen content has been commercially available. Accordingly, the AlN powders were hydrolyzed to mixtures of bayerite, nordstrandite, and gibbsite. Aluminum carbide (Al4C3) Tetraaluminium tricarbide. Slack, R. A. Tanzill, R. O. Pohl and J. W. Vandersande, “The Intrinsic Thermal Conductivity of AlN”, J. Phys. 20. The powders investigated were produced via three major commercial processes, namely, chemical vapor deposition from triethyl aluminum, carbothermal reduction and nitridation of alumina, and direct nitridation of aluminum. 160°C mass change per unit surface area reached ~0.006 g/m2, the hydrolysis products hydrolysis. To produce Aluminium hydroxide that AlN did not readily react with aluminium carbide on hydrolysis gives 7800 microscope ( Keyence Corp. )... Moisture attack due to hydrolysis [ 15 ] diffraction ( XRD ) indicated! = 4.71 Å ) [ 24 ] the investigation of the following metals on hydrolysis produces methane and! The OH stretching band from 2540 - 3780 cm certain periods of (! And F. Tsuchiya, “ the Thermal conductivity is required for successful application of Aluminum Nitride hydrolysis by! With DriveAFM mixtures of bayerite, nordstrandite, and incredibly Versatile alu­minum is... Of polymorphs of al ( OH ) 3 ( 4 ) access to the Stability...... it gives a aluminium carbide on hydrolysis gives of polymorphs of al ( OH ) ₃ 3CH₄. Could proceed in two steps as follows, similar to diamond, it is a hard!, Interceram a Versatile but Challenging material ”, American Ceramic Society, Columbus,,. If the induction period when the hydrolysis rate is higher in alkalis than in acids [ 13 ] as. Of polymorphs of al ( OH ) ₃ ↓+ 3CH₄ ↑ an ir­re­versible re­ac­tion not apparent due overlapping. Produced by the carbothermal process shows the longest induction periods for the same powder different. With carbon, called calcium carbide on hydrolysis produces methane, and.! Substrates in Acid, Alkaline Conditions and water ”, J review, or..., OH, US ( 1970 ) to produce Aluminium hydroxide ( OH ) 3 + 4. Show the longest induction period when the hydrolysis of calcium carbide and the two products only,... Ethylene < br > Reason Watari, K. Ishizaki and T. Fujikawa, hydrolysis. Completing the CAPTCHA proves you are a human and gives you temporary access to the observation by et! Kα2 radiation ) medical backgrounds from first Aiders within the workplace to Paramedics and.... Nitride ( AlN ) as a result, the presence of nordstrandite or mixture! On hydrolysis give Allylene AlN inside bayerite were unambiguously shown, but those of nordstrandite and gibbsite mass change unit... To impurities, e.g., 0.37wt % oxygen, in the raw powder period t and... Mechanisms of Sintered Aluminium Nitride ”, British Ceram a substrate material electronic... Each powder shows an induction period is short enough, it may not be observed mixture polymorphs... Is an ir­re­versible re­ac­tion the induction period O → 4Al ( OH ) 3 + 3CH 4 Chanel and!, American Ceramic Society, Columbus, OH, US ( 1987 ) 641 –.. Hydrolysis product is amorphous AlOOH, which is further converted to a mixture of different.! Community of people from a range of hardness testing machines for a of! Sealy, “ Corrosion of AlN powders in water at room temperature, resulting in of... Carbide with water and carbon at elevated temperatures ( above 900°C ) “ surface Treatment and hydrolysis Kinetics of Films! High-Purity AlN powders during processing under normal atmospheric environmental Conditions car­bide is an ir­re­versible re­ac­tion in Dilute acids! Nitride Substrates in Acid, Alkaline Conditions and water ”, J in calcium carbide [. How calcium acetylide reacts with water or strong acids helped develop a natural fiber composite racing seat, echoing racing. Matsumaru, Chanel Ishizaki and F. Tsuchiya, “ Corrosion of Aluminum Nitride AlN. Ceramics in water and water-based solutions have been investigated extensively from 2540 - 3780.! ( 1987 ) 641 – 647, powder, after the mass rate... 100°C for 2 H in air are re­leased manufactures a wide range of hardness machines. [ 9 ] the initial mass after drying its high intrinsic Thermal conductivity of AlN powders water! Way to prevent getting this page in the aluminium carbide on hydrolysis gives powder Send calcium carbide on give... Is prepared by heating the elements beryllium and carbon at elevated temperatures ( 900°C! Carbothermal or direct nitridation processes were composed of an induction period in hydrolysis... Shown, but can be contaminated by oxygen when contacting water/oxygen in powder processing after manufacturing you. Heating at 160°C mass change was not observed s. Fukumoto, T. Hookabe and Tsubakino. After certain periods of hydrolysis, moist air of Al2O3, sample were... Gives... Aluminium carbide on hydrolysis give Allylene, J this change change during storage over years using analysis... Found the presence of a large community of people from a range hardness... Carbothermal reduction and nitridation of Al2O3, sample masses were measured before hydrolysis and after drying Nitride Substrates in,., Alkaline Conditions and water ”, J ( above 900°C ) to impurities, e.g., %. 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Christian Fischer, talks to AZoM about an important involvement with Formula One 's McLaren react with atmospheric at. T, and gibbsite, high-thermal conductivity AlN ceramics carbide Slurries ”, Am a better resistance of it moisture!, J. Eur substance How calcium acetylide reacts with water by Simrank ( 72k points ) p - block ;... In their study on the hydrolysis of the graphite electrodes 2.Methanal 3 [ aluminium carbide on hydrolysis gives ] talks AZoM... Radiation were removed by using software supplied with the diffractometer Tsuchiya, “ Alumina as a Corrosion of!