Eng 45 - 4.2 For the Ai—Mg system with a phase diagram in Chap[er 9 showing‘incomplcte solid solution which of the Hume-Roman rules are

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Unformatted text preview: 4.2. For the Ai—Mg system with a phase diagram in Chap- [er 9 showing‘incomplcte solid solution. which of the Hume-Roman: rules are violated? {Sec Problem 4.1.) {era/Cf i: r}! 'O-MJa-n, I}? = 0.360“... “gun a mggzgmz: MK («5%) 6.! [Pu/edifl .' 14/ 5114:, I” is 199 fl/¢#3:Al=/.5a,J/€’ =/.Z fl —- 'S'J’Z :: 5'7 a’lflerence- ,1 “091 2 " fut-#4: A/Ah mil-a "(3-f- AJ 49 Au MARI: on! J?"- me... rule M1“ .7 (ac-M nu and...) fig; m [a hinder 3 £613ch hezniMfi'ec. dimer A; 9.5 7!) 6Jme 4rd?“ (ah-4.“) % 4.11 Calculate the number of Mg2+ vacancies produced by the solubility of t moi of A1203 in 99 Inn] of M30 [see Figm ‘$45}. 1»! Ago, A. 99...! ago —a- 99m! 0 Elk. 6gb- MJ 9) 10.: u! 0 min. A. “Maid-m 9?.ha/ finish It"; MJO) + 21...: c.42— sil- {5--- 450,) la! 1...! cub. 3.1:. i... add aha... ——r 10.: “I - {and a 1 and 4‘9 “nu-we = 0.59.73 no“ wan—era. % 4.17. Calculate the density of vacant sites (in 111—3) in a single crystal of silicon if the fraction of vacant lattice sites is l x 10". Me. 0+0‘Mit (leaflé 14f Sr’jfcon Calder/1J1)": 43/361)! Lug Amid .. -1 3.3 _3 Vatdgqsily = /></0 7min" xsToox/o am-m at _ == 5001([0 m 3 4.20. Calculate the density of Schonky pairs (in “1—3) in CaO if the fraction of vacant lattice sites is 5 x 10“. (The densin at C30 is 3.45 Mg‘m3 .) (Jamil-fl 076 Cat? “fairs” = 3.45 tin—g K (Moll Inn (40.0.9- [Acojj “3 5 0.6 :1 2+ X 0 3X10 )5 . m “‘13—”: ‘” =3'7"“°”/““”"/*”3 The“) -6 - 2.! elf/.1517? VAC-Pair: ‘-'-' 5X10 {pm}- 1I): 3.7/XZO fan}; /M3 -.= A85x!023 Ina—3 ‘-'-" 0.!35K/04+h—3 ...
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This note was uploaded on 02/18/2010 for the course ENGINEEING 32145 taught by Professor Stroeve during the Fall '09 term at Universidad de Carabobo.

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Eng 45 - 4.2 For the Ai—Mg system with a phase diagram in Chap[er 9 showing‘incomplcte solid solution which of the Hume-Roman rules are

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