Effect of yttrium addition on the glass forming ability of Co-based alloys
Effect of yttrium addition on the glass forming ability of Co-based alloys
复制标题
钇添加对钴基合金玻璃形成能力的影响
DOI：
10.3139/146.101676
复制
发表时间：
2008
影响因子：
0.8
通讯作者：
Bai
中科院分区：
文献类型：
--
作者：
Hong Wu;Yong Liu;Shiwen He;Zuming Liu;Bai
摘要采用快淬法制备了钴基非晶合金薄带。采用X射线衍射分析和差示扫描量热法研究了稀土元素钇对玻璃形成能力和热稳定性的影响。结果表明，少量钇对提高Co - Fe - Zr - Nb - B合金的非晶形成能力和热稳定性是有效的。淬火态玻璃带，含4原子%钇显示出最高的GFA和热稳定性。玻璃化转变温度Tg为886 K，约化玻璃化转变温度Trg为0.618，过冷液相区ΔTx为96 K，GFA参数γ为0.423，维氏硬度为1158。晶化动力学研究表明，（Co 45 Fe 21 Zr 4 Nb 10 B20）96 Y 4玻璃带的第一个晶化峰的晶化活化能高达826 kJ mol− 1。含钇合金优异的玻璃形成面积和热稳定性主要归因于钇的加入对氧的清除作用和引入的大的原子尺寸失配。
Abstract Cobalt-based amorphous alloy ribbons were prepared by means of melt-spinning. The effect of addition of a rare earth element yttrium on the glass forming ability (GFA) and thermal stability were investigated by X-ray diffraction analysis and differential scanning calorimetry. The results show that a small amount of yttrium is effective in improving the glass forming ability and thermal stability of a Co – Fe – Zr – Nb – B alloy. As-quenched glassy ribbon containing 4 at.% yttrium shows the highest GFA and thermal stability. The glass transition temperature Tg, reduced glass transition temperature Trg, supercooled liquid region ΔTx, GFA parameter γ and Vickers hardness are 886 K, 0.618, 96 K, 0.423 and 1158 respectively. Crystallization kinetic studies show that the crystallization activation energies for (Co45Fe21Zr4Nb10B20)96Y4 glassy ribbon are as high as 826 kJ mol− 1 for the first crystallization peak. The excellent GFA and thermal stability of Y-containing alloy is mainly attributed to the scavenging of oxygen and large mismatch in atomic size induced by the addition of yttrium.
影响因子：
9.4
作者：
Inoue, A;Shen, BL;Yavari, AR
通讯作者：
Yavari, AR