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金属学报  1986, Vol. 22 Issue (6): 135-138    
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Pd-Si基非晶金属的拉伸膨胀及转变过程的体积效应
郑福前;胡健松
昆明贵金属研究所;昆明贵金属研究所
THERMAL EXPANSION OF PdSi-BASE AMORPHOUS METALS AND THEIR VOLUME EFFECT ON TRANSFORMATION
by ZHENG Fuqian; HU Jiansong (Institute of Precious Metals Reseaerch; Kunming)
引用本文:

郑福前;胡健松. Pd-Si基非晶金属的拉伸膨胀及转变过程的体积效应[J]. 金属学报, 1986, 22(6): 135-138.
, . THERMAL EXPANSION OF PdSi-BASE AMORPHOUS METALS AND THEIR VOLUME EFFECT ON TRANSFORMATION[J]. Acta Metall Sin, 1986, 22(6): 135-138.

全文: PDF(308 KB)  
摘要: <正> 非晶态金属在升温过程中体积膨胀、过剩自由体积减少及重新分配同时发生,在比较高的温度还出现玻璃转变和结晶过程,致使长度较一般金属材料发生更复杂的变化。非晶态金属的膨胀特点很像氧化物玻璃。为了进一步认识其膨胀规律,本文用拉伸法测量了6种Pd-Si基金属玻璃的膨胀过程。 非晶态合金条带在离心铜转鼓上获得,宽0.5mm左右,厚0.03mm左右。被测样品采取淬火态(经室温长期稳定化)和退火态(以10℃/min的速度升温至玻璃转变温度之后冷却到室温)。 因为非晶条带很薄,热膨胀需用拉伸法测量,装置如文献[5]中描述。样品的有效长度为30mm。用温度程序控制器控温,全部实验采用升温速率为10℃/min,流动氩气保护。拉伸负
Abstract:The volume effect of 6 PdSi-base amorphous alloys on heating has been measured by a tension method. The fractional free volume of 3 ternary alloys at the glass transition temperature is calculated to be 0.02—0.03 which is approaching the value 0.025 of ordinary amorphous materials. The relationship between free volume increment of 6 materials in equilibrium state and relative viscosity is consistent with the viscous flow free volume model.
收稿日期: 1986-06-18     
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