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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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Nb对Zr基大块非晶合金热稳定性、非晶形成能力及机械性能的影响
, PP. 534-538
Keywords: 大块非晶合金,热稳定性,非晶形成能力
Abstract:
本文利用水冷铜模铸造法成功制备了Zr70Ni10Cu20）90-xNbxAl10（x=0，2，5和7at%）大块非晶合金，采用XRD、DSC和DTA研究了Nb对（Zr70Ni10Cu20）90-xNbxAl10合金体系热稳定性和非晶合金形成能力(GFA)的影响。结果表明，适量Nb的添加可有效提高（Zr70Ni10Cu20）90-xNbxAl10合金的GFA和热稳定性。当Nb含量为2at%时，合金具有最宽的过冷液态区(ΔTx＝119K)，和最大的非晶形成能力（参数γ=Tx/(Tg+Tl)为0.435）。Nb的适量添加也有利于提高大块非晶合金的强度和塑性应变，其中含2at%Nb大块非晶的抗压强度和断裂应变量分别达到1783MPa和11.1%。
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