Melting of Pb clusters without free surfaces
文献类型：期刊论文
| 作者 | Z. H. Jin ; H. W. Sheng ; K. Lu |
| 刊名 | Physical Review B
 |
| 出版日期 | 1999 |
| 卷号 | 60期号:1页码:141-149 |
| 关键词 | molecular-dynamics particles aluminum crystal lattice point al nanocrystals transition nucleation |
| ISSN号 | 1098-0121 |
| 中文摘要 | Melting behaviors of Pb clusters without free surfaces have been studied using molecular dynamics and the Sutton-Chen (SC) potential. Two Pb clusters (Pb(N), with N= 201 and 249) are selected and each of them has been embedded in the core of an Al(4033) cubo-octahedron, but with different orientation relationship with Al coatings. For the Pb(201) cluster, where a parallel cube-cube relationship exists with the Al lattice, semicoherent interfaces can be formed and the core can be superheated up to 750 K, in comparing to the equilibrium melting point of 615+/- 10 K for bulk Pb predicted using the SC potential. On further elevating the temperature, a simultaneous melting of both the Pb core and the outer Al coating will occur. For the Pb(249) cluster without a parallel orientation relationship with Al, no effective semicoherent interface can be formed, and the core premelts at about 500 K without breaking the crystalline structure of Al shells. The melting point of the Pb inclusions can be predicted using thermodynamic relations. For different Pb-Al interfaces, two melting mechanisms exist: one is the homogeneous melting which leads to a melting point elevation and the other is the heterogeneous melting which can induce a melting point depression. [S0163-1829(99)09625-3]. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/37388]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | Z. H. Jin,H. W. Sheng,K. Lu. Melting of Pb clusters without free surfaces[J]. Physical Review B,1999,60(1):141-149. |
| APA | Z. H. Jin,H. W. Sheng,&K. Lu.(1999).Melting of Pb clusters without free surfaces.Physical Review B,60(1),141-149. |
| MLA | Z. H. Jin,et al."Melting of Pb clusters without free surfaces".Physical Review B 60.1(1999):141-149. |
入库方式： OAI收割
来源：金属研究所
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