Received date: 2012-07-12
Revised date: 2012-08-17
Online published: 2012-11-11
Supported by
Supported by National Natural Science Foundation of China (Nos.u0837601, 51071159 and 51031003)
The Ni-Ag alloy has good mechanical properties, high corrosion resistance and electrical conductivity. It is an excellent candidate to be used in many high-tech fields of aerospace, energy resource and chemical engineering etc. This alloy, however, is a typical monotectic system. Generally, the liquid--liquid phase transformation leads to the formation of a solidification microstructure with serious phase segregation. The manufacturing of this alloy is thus extremely difficult. Injection casting has already been carried out with the Ni-Ag monotectic alloy. The sample with composite microstructure, in which Ag-rich particles dispersed homogeneously in Ni matrix has been obtained. A model describing the microstructure evolution during injection casting of the Ni-Ag monotectic alloy has been proposed. The process of microstructure formation has been simulated and discussed in details. The results indicate that the Ostwald coarsening of Ag-rich droplets is very weak during cooling in miscibility gap under injection casting cooling conditions. The dispersivity of the primary Ag--rich phase is controlled by the nucleation of Ag-rich droplets during the liquid-liquid transformation. The number density ($N$) and average radius (<R>) of primary Ag--rich particles depend exponentially on the cooling rate of the alloy during the nucleation of Ag-rich droplets ($\dot{T}_{\rm Nuc}$) according to $N\propto\dot{T}_{\rm Nuc}^{1.8}$ and $\langle R\rangle\propto\dot{T}_{\rm Nuc}^{-0.6}$.
ZHAO Lei ZHAO Jiuzhou . STUDY OF THE SOLIDIFICATION OF Ni-Ag MONOTECTIC ALLOY[J]. Acta Metall Sin, 2012 , 48(11) : 1381 -1386 . DOI: 10.3724/SP.J.1037.2012.00422
[1] Tsuji K, Inada H, Kojima K, Satoh M, Higashi K, Miyanami K, Tanimura S. J Mater Sci, 1992; 27: 1179
[2] Michal R, Saeger K E. IEEE Trans Comp Hybrids Manuf Technol, 1989; 12: 1
[3] Zhang Z Y, Nenoff T M, Huang J Y, Berry D T, Provencio P P. J Phys Chem, 2009; 113C: 1155
[4] Xie M, Zheng F Q,Wei J, Liu J L, Hu J S, Gu J Z, Li X. Precious Met, 1997; 18: 1
(谢 明, 郑福前, 魏 军, 刘建良, 胡建松, 顾江镇, 李 雄. 贵金属, 1997; 18: 1)
[5] Liu Z J, Cao J, Qu X H, Huang B Y, Li Z Y, Chen S Q, Lei C M. Chin Pat, 00103911.3, 2000
(刘志坚, 曹健, 曲选辉, 黄伯云, 李志友, 陈仕奇, 雷长明. 中国专利, 00103911.3, 2000)
[6] Dawson A W, Malik K L. US Pat, 5497133, 1996
[7] Cui H B, Guo J J, Su Y Q, Wu S P, Li X Z, Fu H Z. Acta Metall Sin, 2007; 43: 907
(崔红保, 郭景杰, 苏彦庆, 吴士平, 李新中, 傅恒志. 金属学报, 2007; 43: 907)
[8] Shi R P, Wang Y, Wang C P, Liu X J. Appl Phys Lett, 2011; 98: 204106
[9] Wang W L, Li Z Q, Wei B. Acta Mater, 2011; 59: 5482
[10] Zhou F M, Sun D K, Zhu M F. Acta Phys Sin, 2010; 59: 3394
(周丰茂, 孙东科, 朱鸣芳. 物理学报, 2010; 59: 3394)
[11] Zuo X W, Wang E G, Han H, Zhang L, He J C. Acta Metall Sin, 2008; 44: 1219
(左小伟, 王恩刚, 韩 欢, 张 林, 赫冀成. 金属学报, 2008; 44: 1219)
[12] Zhao J Z, Gao L L, He J, Wang J T, Chen G Y. Acta Metall Sin, 2006; 42: 113
(赵九洲, 高玲玲, 何 杰, 王江涛, 陈桂云. 金属学报, 2006; 42: 113)
[13] Qin G Y, Wang J H, Zhao H Z, Ning Y T, Xu S Y, Guo J X. Chin J Nonferrous Met, 2009; 19: 286
(秦国义, 王剑华, 赵怀志, 宁远涛, 许思勇, 郭锦新. 中国有色金属学报, 2009; 19: 286)
[14] Kuntyi O I, Olenych R R. Russ J Appl Chem, 2005; 78: 556
[15] Zhao J Z, Li H L, Xing C Y, Zhang X F, Wang Q L, He J. Comput Mater Sci, 2010; 49: 121
[16] He J, Zhao J Z, Ratke L. Acta Mater, 2006; 54: 1749
[17] Hu Z Q, Zhang H F. Acta Metall Sin, 2010; 46: 1391
(胡壮麒, 张海峰. 金属学报, 2010; 46: 1391)
[18] Zhao J Z, Guo J J, Jia J, Li Q C. Trans Nonferrous Met Soc China, 1995; 5: 85
[19] Zhao J Z, Gao L L, He J. Appl Phys Lett, 2005; 87: 131905
[20] Zhao J Z, Ratke L, Feuerbacher B. Modell Simul Mater Sci Eng, 1998; 6: 23
[21] Granasy L, Ratke L. Scr Metall Mater, 1993; 28: 1329
[22] Liu X J, Gao F, Wang C P, Ishida K. J Electron Mater, 2008; 37: 210
[23] Dinsdale A T. Calphad, 1991; 15: 317
[24] Kaptay G. Mater Sci Forum, 2006; 508: 269
[25] Kaban I G, Hoyer W. Phys Rev, 2008; 77B: 125426
[26] Brandes E A, Brook G B. Smithells Metals Reference Book. 7th Ed, Oxford: Butterworth–Heinemann Ltd., 1992: 14–7
[27] Pommrich A I, Meyer A, Holland–Moritz D, Unruh T. Appl Phys Lett, 2008; 92: 241922
[28] Roy A K, Chhabra R P. Metall Mater Trans, 1988; 19A: 273
[29] Su X P, Yang S, Wang J H, Tang N–Y, Yin F C, Li Z, Zhao M X. J Phase Equilib Diffus, 2010; 31: 333
[30] Louzguine–Luzgin D V, Setyawan A D, Kato H, Inoue A. Appl Phys Lett, 2006; 88: 251902
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