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The rapid solidification process of liquid Cu64Zr36 alloy is simulated using a molecular dynamics method. The evolution in micro-structures are analyzed by means of pair distribution functions (PDF), Honeycutt-Andersen (H-A) bond-type index method and cluster-type index method (CTIM). It is found that both of liquid and rapidly solidified solid mostly consist of (12 0 12 0) icosahedra and their distorted (12 8/1551 2/1541 2/1431) configurations at a cooling rate of 50 K/ns, most of which are Cu-centered Cu8Zr5 clusters, followed by Cu7Zr6 and then Cu9Zr4 clusters. Size distribution of icosahedral medium-range order (IMRO) clusters linked by intercross-sharing (IS) atoms in the liquid and the glassy solid presents the magic number sequences of 13, 19, 25,···and 13, 19, 23, 25, 29, 37···, respectively. The track of atoms reveals no icosahedral clusters in rapidly solidified solid that can be detected in the liquid alloy. Onset temperature of configuration heredity emerges in the supercooled liquid region of Tm–Tg. A direct and perfect heredity of icosahedra is found to be dominant and a distinct ascent in heredity fraction takes place at Tg. Compared with (12 8/1551 2/1541 2/1431) distorted icosahedra, (12 0 12 0) standard icosahedra are of high structural stability and configurational genetic ability below Tg, whereas only a few can keep their chemical composition unchanged. By partial heredity, even some IMRO clusters in super-cooled liquid can be transmitted to glassy alloy.
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Keywords:
- rapid solidification /
- molecular dynamics /
- icosahedral clusters /
- heredity
[1] Cheng Y Q, Ma E 2011 Prog. Mater. Sci. 56 379
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[21] Li Y, Guo Q, Kalb J A, Thompson C V 2008 Science 322 1816
[22] Fang X W, Wang C Z, Hao S G, Kramer M J, Yao Y X, Mendelev M I, Ding Z J, Napolitano R E, Ho K M 2011 Sci. Rep. 1 194
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[24] Tian H, Zhang C, Wang L, Zhao J J, Dong C, Wen B, Wang Q 2011 J. Appl. Phys. 109 123520
[25] Plimpton S 1995 J. Comput. Phys. 117 1
[26] Mendelev M I, Sordelet D J, Kramer M J 2007 J. Appl. Phys. 102 043501
[27] Honeycutt J D, Andersen H C 1987 J. Phys. Chem. 91 4950
[28] Hou Z Y, Liu L X, Liu R S, Tian Z A, Wang J G 2010 J. Appl. Phys. 107 083511
[29] Tian Z A, Liu R S, Dong K J, Yu A B 2011 Europhys. Lett. 96 36001
[30] Pan S P, Qin J Y, Wang W M, Gu T K 2012 J. Non-Cryst. Solids 358 1873
[31] Doye J P K, Wales D J 2003 J. Chem. Phys. 118 2792
[32] Tian Z A, Liu R S, Zheng C X, Liu H R, Hou Z Y, Peng P 2008 J. Phys. Chem. A 112 12326
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[1] Cheng Y Q, Ma E 2011 Prog. Mater. Sci. 56 379
[2] Inoue A 2000 Acta Mater. 48 279
[3] Park E S, Kim D H, Kim W T 2005 Appl. Phys. Lett. 86 061907
[4] Xia M X, Meng Q G, Zhang S G, Ma C L, Li J G 2006 Acta Phys. Sin. 55 6543 (in Chinese) [夏明许, 孟庆格, 张曙光, 马朝利, 李建国 2006 物理学报 55 6543]
[5] Han G, Qiang J B, Wang Q, Wang Y M, Xia J H, Zhu C L, Quan S G, Dong C 2012 Acta Phys. Sin. 61 036402 (in Chinese) [韩光, 羌建兵, 王清, 王英敏, 夏俊海, 朱春雷, 全世光, 董闯 2012 物理学报 61 036402]
[6] Wang Z Y, Yang Y S, Tong W H, Li H Q, Hu Z Q 2006 Acta Phys. Sin. 56 1543 (in Chinese) [王珍玉, 杨院生, 童文辉, 李会强, 胡壮麒 2006 物理学报 56 1543]
[7] Zhang J X, Li H, Zhang J, Song X G, Bian X F 2009 Chin. Phys. B 18 4949
[8] Cheng Y Q, Sheng H W, Ma E 2008 Phys. Rev. B 78 014207
[9] Ma D, Stoica A D, Wang X L, Lu Z P, Xu M, Kramer M 2009 Phys. Rev. B 80 014202
[10] Hao S G, Wang C Z, Li M Z, Napolitano R E, Ho K M 2011 Phys. Rev. B 84 064203
[11] Wang H, Hu T, Qin J Y, Zhang T 2012 J. Appl. Phys. 112 073520
[12] Yang L, Bian X F, Pan S P, Qin J Y 2012 Acta Phys. Sin. 61 036101 (in Chinese) [杨磊, 边秀房, 潘少鹏, 秦敬玉 2012 物理学报 61 036101]
[13] Wang L, Zhang Y N, Mao X M, Peng C X 2007 Chin. Phys. Lett. 24 2319
[14] Zhang Y, Mattern N, Eckert J 2011 J. Appl. Phys. 110 093506
[15] Ding J, Cheng Y Q, Sheng H W, Ma E 2012 Phys. Rev. B 85 060201
[16] Liu X J, Xu Y, Lu Z P, Hui X, Chen G L, Zheng G P, Liu C T 2011 Acta Mater. 59 6480
[17] Mattern N, Schps A, Khn U, Acker J, Khvostikova O, Eckert J 2008 J. Non-Cryst. Solids 354 1054
[18] Tang M B, Zhao D Q, Pan M X, Wang W H 2004 Chin. Phys. Lett. 21 901
[19] Jing Q, Xu Y, Zhang X Y, Li G, Li L X, Xu Z, Ma M Z, Liu R P 2009 Chin. Phys. Lett. 26 086109
[20] Mendelev M I, Kramer M J, Ott R T, Sordelet D J 2009 Philos. Mag. 89 109
[21] Li Y, Guo Q, Kalb J A, Thompson C V 2008 Science 322 1816
[22] Fang X W, Wang C Z, Hao S G, Kramer M J, Yao Y X, Mendelev M I, Ding Z J, Napolitano R E, Ho K M 2011 Sci. Rep. 1 194
[23] Lad K N, Jakse N, Pasturel A 2012 J. Chem. Phys. 136 104509
[24] Tian H, Zhang C, Wang L, Zhao J J, Dong C, Wen B, Wang Q 2011 J. Appl. Phys. 109 123520
[25] Plimpton S 1995 J. Comput. Phys. 117 1
[26] Mendelev M I, Sordelet D J, Kramer M J 2007 J. Appl. Phys. 102 043501
[27] Honeycutt J D, Andersen H C 1987 J. Phys. Chem. 91 4950
[28] Hou Z Y, Liu L X, Liu R S, Tian Z A, Wang J G 2010 J. Appl. Phys. 107 083511
[29] Tian Z A, Liu R S, Dong K J, Yu A B 2011 Europhys. Lett. 96 36001
[30] Pan S P, Qin J Y, Wang W M, Gu T K 2012 J. Non-Cryst. Solids 358 1873
[31] Doye J P K, Wales D J 2003 J. Chem. Phys. 118 2792
[32] Tian Z A, Liu R S, Zheng C X, Liu H R, Hou Z Y, Peng P 2008 J. Phys. Chem. A 112 12326
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