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基于特征温度的玻璃形成能力判据 被引量：1

Criteria of glass-forming ability based on characteristic temperatures
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摘要 基于文献及我们的研究结果,对以玻璃转变温度(Tg),晶化开始温度(Tx)和液相线温度(Tl)这3个特征温度表示的合金玻璃形成能力(GFA)判据进行分析和对比。这些判据包括Trg=Tg/Tl、ΔTx=Tx-Tg、γ=Tx/(Tg+Tl)、ΔTrg=(Tx-Tg)/(Tl-Tg)、α=Tx/Tl、β=Tx/Tg+Tg/Tl、δ=Tx/(Tl-Tg)、β=TxTg/(Tl-Tx)2、φ=Trg(ΔTx/Tg)0.143、γm=(2Tx-Tg)/Tl和ω=Tg/Tx-2Tg/(Tg+Tl)。统计分析结果表明:参数ω与非晶合金的GFA有最强的相关性。基于非晶玻璃形成能力的物理本质及分析上述判据,非晶合金的GFA与Tg/Tl和Tx/Tg这2个值成正比,其中Tg/Tl反映合金熔体冷却时的液相稳定性,而Tx/Tg反映合金加热时的抗晶化能力。 Based on the relative literature and our investigation, the criteria for predicting the glass-forming ability （GFA） of bulk amorphous alloys were analyzed and compared in detail. These criteria include Trg=Tg/T1、△T=Tx-Tg、γ=Tx/（Tg＋T1）、△Trg=（Tx-Tg）/（T1-Tg）、α=Tx/T1、β=Tx/Tg＋Tg/T1、δ=Tx/（T1-Tg）、β=TxTg/（T1-Tx）^2、φTrg（△Tx/Tg）^0.143、γm=（2Tx-Tg）/T1 and ω=Tg/-2Tg/（Tg＋T1）,which are formulized by the characteristic temperatures such as the glass transition temperature （Tg）, the onset crystallization temperature （Tx） and the off-set liquidus temperature （T1）. The statistical analysis results show that the parameter co has the best correlation with the GFA of metallic glasses. Furthermore, among those GFA parameters mentioned above, the GFA of bulk metallic glasses can be in proportion to Tg/T1 and Tx/Tg factors. According to the physical nature of the GFA and analysis of the above mentioned citeria, Tg/T1 can be used to characterize the liquid phase stability of the alloy melt during cooling, and Tx/Tg can be used to characterize the crystallization resistance of amorphous alloys on reheating.
作者 危洪清 龙志林 张志纯 李乡安 彭建
机构地区 湘潭大学土木工程与力学学院 邵阳学院机械与能源工程系 湘潭大学职业技术学院
出处 《中国有色金属学报》 EI CAS CSCD 北大核心 2009年第1期127-133,共7页 The Chinese Journal of Nonferrous Metals
基金 湖南省科技厅计划资助项目(2008FJ3095)
关键词 块体非晶合金 玻璃形成能力 特征温度 判据 bulk metallic glasses glass-forming ability characteristic temperature criterion
分类号 TG139.8 [一般工业技术—材料科学与工程]
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参考文献39

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共引文献2

同被引文献19

  • 1陈庆军,范洪波,孙剑飞,沈军,钱坤明,线恒泽.Fe-Co-Ni-Zr-Mo-W-B块体非晶合金的玻璃形成能力与热稳定性[J].中国有色金属学报,2005,15(10):1555-1559. 被引量：6
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中国有色金属学报
2009年 第1期

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