朱丽慧,胡涛,彭笑,倪旺阳,刘一雄

• 1:上海大学材料科学与工程学院
• 2:美国肯纳金属公司

摘要(Abstract)：

采用阴极电弧蒸发工艺在WC-6Co硬质合金表面制备Ti0.5Al0.5N、Ti0.45Al0.55N和Ti0.4Al0.6N涂层,采用声发射划痕仪测定涂层的结合强度。研究了Al含量对TiAlN涂层结合强度的影响及机理,并分析了TiAlN涂层的失效模式。结果表明,随Al含量增加,Ti1-xAlxN(x=0.5~0.6)涂层结合强度下降。TiAlN涂层结合强度受涂层残余应力与膜基硬度差的影响。Ti0.5Al0.5N涂层残余应力较小,且膜基差异性最小,结合强度最高。Ti0.5Al0.5N和Ti0.45Al0.55N涂层均为楔形剥落,Ti0.4Al0.6N涂层则为屈曲剥落。Al含量增加降低TiAlN涂层结合力,但有利于改善涂层韧性。Ti0.4Al0.6N涂层因含少量较软的h-Al N相,其韧性明显提高。

关键词(KeyWords)： TiAlN涂层;结合强度;失效模式

Abstract:

Keywords:

基金项目(Foundation): 美国kennametal公司资助项目(51171097)

作者(Author): 朱丽慧,胡涛,彭笑,倪旺阳,刘一雄

DOI: 10.13289/j.issn.1009-6264.2015.03.028

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