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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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Al-Si合金等离子涂层Ni-Cr-B-Si的激光重熔
, PP. 315-319
Keywords: 激光表面熔化,Al－Si合金,非晶,纳米晶
Abstract:
利用5kWCO2激光器重熔Al-Si合金表面的Ni－Cr－B－Si等离子喷涂层.SEM和TEM分析结果表明，激光熔层内晶化区和非晶化区共存，在后续熔区的传热作用和周围结晶潜热作用下，有部分非晶晶化为Ni3Al纳米晶（2—5nm），其中一些逐渐长大成为细小的粒状晶．未晶化区硬度极高（HV＝1235），是原等离子喷涂层硬度的4倍。
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