利用Rietveld方法对三元体系Ce-Al-Cu(<50%(原子分数)Cu)中的化合物晶体结构进行修正,验证该体系在传统高频电弧熔炼条件下所得的熔铸合金存在16个单相.利用精修得到的晶体结构参数对其熔铸态固溶度范围进行了计算,发现Cu在Al,α-Ce3Al11,CeAl3和CeAl2中的最大固溶度依次是(原子分数)2.48%,1.6%,3.7%和5.3%,Al在CeCu5中的最大固溶度为44.1%,Al2Cu和AlCu的固溶度区域分别为(原子分数)32.1%～32.7%Cu和53.5%～57.3%Cu.证实在熔铸态下研究的体系中存在5个三元化合物:CeAl12-xCu(4.0≤x≤4.53),CeAl4-xCu(0.73≤x≤1.10),Ce2Al17-xCux(6.49≤x≤7.87),CeAl13-xCux(6.62≤x≤6.92)和Ce2AlCu2,而Al92Ces,Al3Cu2和CeAlCu并不存在.
参考文献
| [1] | Tan L;Kreyssig A;Kim J W;Goldman A I Gschneidner K A .Magnetic structure of GdSGe4[J].Physical Review B:Condensed Matter,2005,71:214. |
| [2] | Cadogan J M;Ryan D H;Alteunian Z;Wang H B Swainson I P .The magnetic structure of Nd5Si4 and Nd5Ge4[J].Journal of Physics:Condensed Matter,2002,14:71. |
| [3] | Bao G H;Huang Q;Yang H F;HoDL Lynn J W Liang J K .Magnetic phase transitions in Pr5Ge4[J].Physical Review B:Condensed Matter,2004,69:94. |
| [4] | Gao M C;Unlu N;Shiflet G J;Mihalkovic M Widom M .Reassessment of Al-Ce and Al-Nd binary systems supported by critical experiments and first-principles energy calculation[J].Metallurgical and Materials Transactions,2005,36(12):3269. |
| [5] | B. Zhang;D.Q. Zhao;M.X. Pan .Formation of cerium-based bulk metallic glasses[J].Acta materialia,2006(11):3025-3032. |
| [6] | Villars P.In Pearson's Handbook of Crystallographic Data for Intermetallic Phases[M].ASM International,Materials Park,OH,1997:309. |
| [7] | Guo J;Kita K;Ohtera K;Nagahora J Inoue A Masumoto T .Formation of new metastable bcc phases by crystallization of amorphous Al92La8 and Al92Ce8 alloys[J].Materials Letters,1994,21(3-4):279. |
| [8] | Liu XJ.;Kainuma R.;Ishida K.;Ohnuma I. .Phase equilibria in the Cu-rich portion of the Cu-Al binary system[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,1998(1/2):201-208. |
| [9] | Ramachandrarao P;Leridjani M .A metastable phase Al3Cu2[J].Journal of Materials Science,1974,9:434. |
| [10] | Chevalier B;Bobet J L .On the synthesis and physical properties of the intennetallics CeCuAl[J].Intermetallics,2001,9(09):835. |
| [11] | Belov N A;Khvan A V .The ternary Al-Ce-Cu phase diagram in the aluminum-rich comer[J].Acta Materialia,2007,55:5473. |
| [12] | Unusov I;Ganiev I N;Shishkin E A .The Al-Cu-Ce phase diagram in aluminum rich comer[J].Izv Ross Akad Nank Metally,1991,3(02):200. |
| [13] | Cordier G;Czech E;Schafer H .On the knowledge of the compounds Ca4Cd5Al3,CaAg4Al7,CaCu6.5Al6 5,SrAg6 5Al6 5 and CeCu6 5Al6 5[J].Journal of the Less-Common Metals,1985,108(02):225. |
| [14] | Cordier G;Czech E;Sehafer H;Woll P .Structural characterization of new ternsry compounds of uranium and cerium[J].Journal of the Less-Common Metals,1985,110(1-2):327. |
| [15] | Chevalier B;Bobet J L .On the synthesis and physical properties of the intermetallics CeCuAl[J].Intermetallics,2001,9(09):835. |
| [16] | Bo H;Jin S;Zhang L G;Chan X M .Thermodynamic assessment of Al-Ce-Cu system[J].Journal of Alloys and Compounds,2009,484:286. |
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