Influence of Thermal Stability on the Glass-forming Ability of the Ti-Cu Binary Alloys

Song Yanling; Suo Zhongyuan; Qiu Keqiang

doi:10.15980/j.tzzz.2014.12.031

Views : 0 下载量: 111 CSCD: 0

Export
Share
Collection
Album

Influence of Thermal Stability on the Glass-forming Ability of the Ti-Cu Binary Alloys
Vol. 34, Issue 12, Pages: 1340-1343(2014)
Published： 2014 ，
DOI： 10.15980/j.tzzz.2014.12.031

扫描看全文

[1]宋艳玲,索忠源,邱克强.Ti-Cu二元合金热稳定性对非晶形成能力的影响[J].特种铸造及有色合金,2014,34(12):1340-1343.

Song Yanling, Suo Zhongyuan, Qiu Keqiang. Influence of Thermal Stability on the Glass-forming Ability of the Ti-Cu Binary Alloys. [J]. Special Casting & Nonferrous Alloys 34(12):1340-1343(2014)
[1]宋艳玲,索忠源,邱克强.Ti-Cu二元合金热稳定性对非晶形成能力的影响[J].特种铸造及有色合金,2014,34(12):1340-1343. DOI： 10.15980/j.tzzz.2014.12.031.

Song Yanling, Suo Zhongyuan, Qiu Keqiang. Influence of Thermal Stability on the Glass-forming Ability of the Ti-Cu Binary Alloys. [J]. Special Casting & Nonferrous Alloys 34(12):1340-1343(2014) DOI： 10.15980/j.tzzz.2014.12.031.

摘要

采用单辊熔体快淬法制备了厚约40μm

宽2mm的二元TixCu100-x（x=50

57）合金条带。用X射线衍射检测了合金的非晶形成能力

通过差示扫描量热仪（DSC）分析了Ti50Cu50和Ti57Cu43两种非晶合金的热稳定性

利用扫描电镜观察了合金的铸锭组织形貌。结果表明

两种非晶合金均未表现出明显的玻璃转变温度点Tg

晶化温度Tx差别不大

熔化开始温度Tm相差高达35K。通过研究两合金的铸锭母合金显微组织

发现Ti57Cu43合金在非平衡凝固过程中有Ti2Cu相析出

造成形成非晶合金所需的临界冷却速率提高。与Ti50Cu50合金相比

Ti57Cu43合金降低了Ti-Cu二元合金的非晶形成能力。讨论了铸锭显微组织竞争相与热稳定性之间的关系。

Abstract

The binary TixCu100-x（x=50

57）alloys with 40μm in thickness and 2mm in width were prepared by melt spinning method.The amorphous structure of these ribbons was observed by XRD.The thermal stabilities of Ti50Cu50 and Ti57Cu43amorphous alloys were analyzed by DSC.And the microstructures of two ingot were investigated by SEM（scanning electron microscopy）.The results show that ignored glass transition temperature Tgis observed

while only 1Kdifference is observed between crystalline temperature Txeven if the initial melting temperature Tm difference is as high as 35 Kfor Ti50Cu50and Ti57Cu43 amorphous alloys.Ti2 Cu phase in the Ti57Cu43 alloy is precipitated in the non-equilibrium solidification process by microstructures observation

leading to increasing in the required critical cooling rate of Ti57Cu43 amorphous alloy.The glass-forming ability of Ti57Cu43 alloy is reduced compared with Ti50Cu50 alloy.The relationship is discussed between competing phases of microstructures and thermal stabilities of the two amorphous alloys.