Fragility and thermal stability of Pt- and Pd-based bulk glass forming liquids and their correlation with deformability
Fragility and thermal stability of Pt- and Pd-based bulk glass forming liquids and their correlation with deformability
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DOI：
10.1016/j.scriptamat.2006.03.025
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发表时间：
2006-06-01
影响因子：
6
通讯作者：
Chen, HS
中科院分区：
文献类型：
--
作者：
Kato, H;Wada, T;Chen, HS
对(Pt或Pd)-(Ni，Cu)-P大块金属玻璃的脆性参数m进行了表征，并与其他系统进行了比较。结果表明，Pt65Ni15P25合金在过冷液态下是最脆弱和最稳定的，因此是目前发展的BMG中最可行的。为了表示可加工性的程度，引入了变形性d*=log[Eta(T-g(*))/Eta(T-x)]，然后与In和折合热稳定性Delta T-Rx(*)=(T-x-T-g(*))/T-g(*)进行了关联。以Eta(T-g(*))/Eta(T)和m(.)已经为各种BMG建立了[(t-T-g(*))/T-g(*)]，因此d(*)可以唯一地与m(.)相关。Delta T-RX(*)。(C)2006 Acta Materialia Inc.由爱思唯尔有限公司出版。保留所有权利。
The fragility parameter m of (Pt or Pd)-(Ni, Cu)-P bulk metallic glasses (BMGs) was characterized and compared to other systems. The results indicate that the Pt65Ni15P25 alloy is the most fragile and thermally stable at the supercooled liquid state, thus is the most workable among the presently developed BMGs. To express the degree of workability, a deformability d* = log[eta(T-g(*))/eta(T-x)] is introduced then correlated with in and the reduced thermal stability Delta T-rx(*) = (T-x - T-g(*))/T-g(*). A master curve in term of eta(T-g(*))/eta(T) and m (.) [(T - T-g(*))/T-g(*)] has been established for various BMGs, d(*) thus can be uniquely related to m (.) Delta T-rx(*). (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.