Abnormal resistivity and viscosity behavior in Sb-rich Pb-Sb melts

作者：Guo Feng xiang; Wang Wei; Yang Hai long; Qin Jing yu; Tian Xue lei^*

来源：Transactions of Nonferrous Metals Society of China, 2012, 22(12): 3113-3119.

DOI：10.1016/S1003-6326(11)61579-3

• electrical resistivity
• viscosity
• Peierls distortion
• undercooled liquid
• Pb-Sb alloys

Electrical resistivity and viscosity of Pb-Sb alloys are measured to investigate Peierls distortion behavior in the melts. In Pb30Sb70, Pb20Sb80, and Pb10Sb90 melts, temperature dependence of resistivity deviates from linear dependence during cooling. At 663 degrees C, different trends in isothermal behavior between experimental and theoretical resistivities, are interpreted as the existence of Peierls distortion in Sb-rich melts. In Pb30Sb70 and Pb20Sb80 melts, abnormal viscosity results verify the existence of abnormal structure transition, which is attributed to the formation of large Sb clusters with Peierls distortion. In undercooled liquid Pb20Sb80, minute resistivity coefficient and quadratic resistivity behavior are interpreted as the rapid increase of cluster size of Sb clusters with Peierls distortion, which provides preferential nucleation sites for higher structure similarity to the crystalline and lower liquid-solid interfacial energy.

• 出版日期2012-12
• 单位山东大学