Mg_(65)Cu_(25)Y_(10)和Mg_(60)Cu_(30)Y_(10)镁基金属玻璃的形成及其热稳定性  

Formation and Thermal Stability of Mg_(65)Cu_(25)Y_(10) and Mg_(60)Cu_(30)Y_(10) Mg-Based Metallic Glasses

作　　者：黎业生[1] 吴子平[1] 董定乾[1] 

机构地区：[1]江西理工大学,江西赣州341000

出　　处：《稀有金属材料与工程》2006年第A02期298-302,共5页Rare Metal Materials and Engineering

基　　金：江西省教育厅科技攻关资助项目

摘　　要：通过水淬法制备出Mg65Cu25Y10和Mg60Cu30Y10金属玻璃,采用差热分析DTA和X射线衍射对其玻璃形成能力、热稳定性能进行了研究:利用显微维氏硬度仪测量硬度。结果显示:Mg65Cu25Y10合金比Mg60Cu30Y10合金具有更好的玻璃形成能力,前者的过冷液态区间(△Tx=Tx1-Tg)高出后者7．6 K;经过等温退火后,Mg65Cu25Y10金属玻璃晶化起始温度在433 K～493 K之间,而Mg60Cu30Y10金属玻璃的晶化起始温度在533 K～573 K之间,说明Mg60Cu30Y10金属玻璃的热稳定性高于Mg65Cu25Y10;Mg60Cu30Y10较Mg65Cu25Y10有更高的硬度。Mg65Cu25Y10 and Mg60Cu30Y10 metallic glasses were prepared by water quenching; their respective glass-forming ability and the thermal stability were also studied by use of differential thermal analysis （DTA） and x-ray diffraction （XRD）. Their hardness was tested by a HV instrument. Based on the DTA results, the Mg65Cu25Y10 alloy has a better glass-forming ability and a wider supercooled liquid region of 7.6 K （Δ Tx=Tx1-Tg） than Mg60Cu30Y10 alloy. The onset temperature of crystallization for Mg65Cu25Y10 metallic glass is at the region of 433 K to 493 K, whereas 533 K to 573 K for Mg60Cu30Y10. It indicates that the thermal stability of Mg60Cu30Y10 metallic glass outperforms Mg65Cu25Y10 metallic glass. And the Mg60Cu30Y10 metallic glass has higher strength and hardness than Mg65Cu25Y10 metallic glass according to HV hardness testing.

关 键 词：金属玻璃 玻璃形成能力 热稳定性 镁基合金 

分 类 号：TG139.8[一般工业技术—材料科学与工程]