摘要
采用工业纯原料和水冷铜型真空吸铸法研制了直径2 mm的Fe61Co10Zr5W4B20,Fe63Co10Zr5W2B20,Fe63Co10Zr5W4B18三种铁基块状合金,采用X射线衍射法、差示扫描量热法研究了合金的结构和热稳定性,探讨了它们的非晶形成能力。试验结果表明:以上3种合金中,前两种成分的合金几乎均由非晶相组成,第一种合金的玻璃转变温度Tg、晶化温度Tx分别为542℃和617℃,过冷液相区宽度ΔTx达到了75 K;第二种合金的玻璃转变温度Tg、晶化温度Tx分别为521℃和611℃,过冷液相区宽度ΔTx高达90 K,两种铁基非晶合金(特别是第二种合金)具有高的热稳定性和大的非晶形成能力(GFA)。第三种合金由非晶和少量α-Fe晶体组成。
Three iron-based amorphous alloys Fe61Co10Zr5W4B20, Fe63Co10Zr5W2B20 and Fe63Co10Zr5W4B18 with the diameter 2 mm were prepared by water cooled copper mold casting using industrial pure raw materials. X-ray diffraction （XRD） and differential scanning calorimeter （DSC） were used to research the structure and heat stability.？Their glass forming ability （GFA） was investigated. The results show： among the former three alloys, the first and second alloys amost consist of amorphous alloy. The glass forming temperature Tg, crystallization temperture Tx of the first alloy were 542 ℃ and 617 ℃ seperately, and its width of ultracooled liquid phase zone is 75 K. The glass forming temperature Tg, crystallization temperture Tx of the second alloy were 521 ℃ and 611 ℃ seperately, and its width of ultracooled liquid phase zone is 90 K. These two kinds of iron-based amorphous alloy, especially the second one,have high thermal stability and large GFA. The third alloy consists of amorphous alloy and α-Fe crystal.
出处
《铸造》
EI
CAS
CSCD
北大核心
2006年第9期898-900,共3页
Foundry
基金
国家自然科学基金(50371020)
广东省自然科学基金(20010056)
广东省科技计划项目(2003B12106)
