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中國有色金屬學(xué)報

ZHONGGUO YOUSEJINSHU XUEBAO

第19卷第1期總第118期 2009年1月

文章編號：1004-0609(2009)01-0127-07

基于特征溫度的玻璃形成能力判據(jù)

危洪清^{1, 2}，龍志林¹，張志純³，李鄉(xiāng)安¹，彭建¹

(1. 湘潭大學(xué) 土木工程與力學(xué)學(xué)院，湘潭 411105；
2. 邵陽學(xué)院機械與能源工程系，邵陽 422000；
3. 湘潭大學(xué) 職業(yè)技術(shù)學(xué)院，湘潭 411100)

摘要: 基于文獻及我們的研究結(jié)果，對以玻璃轉(zhuǎn)變溫度(T_g)，晶化開始溫度(T_x)和液相線溫度(T_l)這3個特征溫度表示的合金玻璃形成能力(GFA)判據(jù)進行分析和對比。這些判據(jù)包括T_rg=T_g/T_l、ΔT_x=T_x−T_g、γ=T_x/(T_g+T_l)、ΔT_rg=(T_x−T_g)/(T_l−T_g)、α=T_x/T_l、β=T_x/T_g+T_g/T_l、δ=T_x/(T_l−T_g)、β=T_xT_g/(T_l−T_x)²、φ=T_rg(ΔT_x/T_g)^0.143、γ_m=(2T_x−T_g)/T_l和ω=T_g/T_x−2T_g/(T_g+T_l)。統(tǒng)計分析結(jié)果表明：參數(shù)ω與非晶合金的GFA有最強的相關(guān)性。基于非晶玻璃形成能力的物理本質(zhì)及分析上述判據(jù)，非晶合金的GFA與T_g/T_l和T_x/T_g這2個值成正比，其中T_g/T_l反映合金熔體冷卻時的液相穩(wěn)定性，而T_x/T_g反映合金加熱時的抗晶化能力。

關(guān)鍵字: 塊體非晶合金；玻璃形成能力；特征溫度；判據(jù)

Criteria of glass-forming ability based on characteristic temperatures

WEI Hong-qing^{1, 2}, LONG Zhi-lin¹, ZHANG Zhi-chun³, LI Xiang-an¹, PENG Jian¹

（1. Civil Engineering & Mechanics College, Xiangtan University, Xiangtan 411105, China;
2. Department of Mechanical and Energy Engineering, Shaoyang University, Shaoyang 422000, China;
3. Vocational-Technical Institute, Xiangtan University, Xiangtan 411100, China）

Abstract: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 T_rg=T_g/T_l, ΔT_x=T_x−T_g, γ=T_x/(T_g+T_l), ΔT_rg=(T_x−T_g)/(T_l−T_g), α=T_x/T_l, β=T_x/T_g+T_g/T_l, δ=T_x/(T_l−T_g), β=T_xT_g/(T_l−T_x)², φ=T_rg(ΔT_x/T_g)^0.143, γ_m= (2T_x−T_g)/T_l and ω=T_g/T_x−2T_g/(T_g+T_l), which are formulized by the characteristic temperatures such as the glass transition temperature (T_g), the onset crystallization temperature (T_x) and the off-set liquidus temperature (T_l). The statistical analysis results show that the parameter ω 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 T_g/T_l and T_x/T_g factors. According to the physical nature of the GFA and analysis of the above mentioned citeria, T_g/T_l can be used to characterize the liquid phase stability of the alloy melt during cooling, and T_x/T_g can be used to characterize the crystallization resistance of amorphous alloys on reheating.

Key words: bulk metallic glasses; glass-forming ability; characteristic temperature; criterion

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW