论文部分内容阅读
利用旋转铜辊急冷法和铜模铸造法制备非晶合金薄带或圆棒,并采用X衍射仪(XRD)、差示扫描量热仪(DSC)和差示热分析仪(DTA)研究了Ta,Nb和Mo对Ti50Ni20Cu25Sn5非晶合金玻璃形成能力(GFA)的影响。结果表明,Ta的添加提高了Ti50Ni20Cu25Sn5合金的GFA,Mo的添加降低了该合金的GFA,Nb的添加则对该合金的GFA没有明显的影响;含Ta合金具有超过60K的宽过冷液态区(ΔTx),且其约化玻璃转变温度因子(Tg/Tm)大于含Nb合金和含Mo合金;采用常规铜模铸造法制备出了直径为1mm的(Ti0.5Ni0.2Cu0.25Sn0.05)98Ta2和(Ti0.5Ni0.2Cu0.25Sn0.05)96Ta4块状非晶圆棒;(Ti0.5Ni0.2Cu0.25Sn0.05)98Ta2块状非晶圆棒的Tg,ΔTx和Tg/Tm分别为678K,84K和0.60,而(Ti0.5Ni0.2Cu0.25Sn0.05)96Ta4块状非晶圆棒的Tg,ΔTx和Tg/Tm分别为680K,70K和0.60。
Amorphous alloy ribbons and round rods were prepared by a rotating copper roll rapid cooling method and a copper die casting method. XRD, DSC and DTA Effect of Ta, Nb and Mo on Glass Forming Ability (GFA) of Ti50Ni20Cu25Sn5 Amorphous Alloy. The results show that the addition of Ta improves the GFA of Ti50Ni20Cu25Sn5 alloy, and the addition of Mo decreases the GFA of the alloy. The addition of Nb has no obvious effect on the GFA of the alloy. The alloy containing Ta has a wide supercooled liquid region ΔTx), and the reduced glass transition temperature factor (Tg / Tm) is greater than that of the Nb-containing alloy and the Mo-containing alloy. A (Ti0.5Ni0.2Cu0.25Sn0.05) 98Ta2 And (Ti0.5Ni0.2Cu0.25Sn0.05) 96Ta4 bulk amorphous rods. The Tg, ΔTx and Tg / Tm of (Ti0.5Ni0.2Cu0.25Sn0.05) 98Ta2 bulk amorphous rods are respectively 678K, 84K and 0.60, respectively. The Tg, ΔTx and Tg / Tm of (Ti0.5Ni0.2Cu0.25Sn0.05) 96Ta4 bulk amorphous rods were 680K, 70K and 0.60, respectively.