Effect of Ag addition on the thermal stability and glass-forming ability of ZrasTiaoCu7.sBe27.5 bulk metallic glass

The thermal stability and glass forming ability （GFA） of Zr35-xTi3oCu7.sBe27.sAgx （x = 0-10） alloys were studied by X-ray diffrac- tion （XRD）, differential scanning calorimetry （DSC） and ultrasonic techniques. We found that the addition of 1 at.% Ag can con- siderably enhance the GFA as indicated by...

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Published in:中国科学通报：英文版 2012, Vol.57 (11), p.1219-1222
Main Author: ZONG HaiTao ZHANG XinYu LI LiXin BIAN LinYan LIANG ShunXing TAN ChunLin
Format: Article
Language:English
Subjects:
X射线衍射仪
体积弹性模量
大块金属玻璃
差示扫描量热
建筑面积
热稳定性
玻璃形成能力
银
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Summary:The thermal stability and glass forming ability （GFA） of Zr35-xTi3oCu7.sBe27.sAgx （x = 0-10） alloys were studied by X-ray diffrac- tion （XRD）, differential scanning calorimetry （DSC） and ultrasonic techniques. We found that the addition of 1 at.% Ag can con- siderably enhance the GFA as indicated by an increase in the critical glass dimension from 15 rnm in the Zr35Ti30CuT.sBe27.5 alloy to 20 mm in the Zr34Ti30Cu7.sBe27.sAgl alloy. However, with the addition of more Ag the supercooled liquid region （ATx） and y parameter （defined as Tx/（Tg＋TO） drastically decreased from 155 K and 0.436 to 76 K and 0.363, respectively, resulting in a de- crease in the GFA. Additionally, the elastic constant （the ratio of shear modulus to bulk modulus or Poisson＇ s ratio） was also used as a gauge to evaluate the GFA in Zr35-xTi30Cu7.sBe27.sAgx alloys.
ISSN:1001-6538
1861-9541