Failure Mode of Micron-thickness Hard Coatings on Soft Substrate in Scratch Test
摘 要
通过磁控溅射方法在不锈钢基底上沉积了不同厚度的硬质钛-硅-氮膜、氮化钛膜、碳化钛膜和类金刚石碳膜,并进行了划痕试验.结果表明:微米级厚层硬质膜的划痕试验呈现相同的规律,即划痕边缘在全过程中出现破裂和脱落,划痕中部先出现膜层弯折破裂,继而出现薄膜部分脱离基底,最后完全脱离基体;而亚微米级厚度类金刚石碳膜的划痕试验在加载早期就同时出现划痕中部的薄膜破裂和脱离,随后出现全部脱离;声发射讯号尖峰的强度、频率与微米级硬质膜破裂和脱落的程度有很好的对应关系,而与亚微米级膜则无此对应关系.
Abstract
Hard coatings of 1-3 μm thickness,like DLC,TiC,TiN and Ti-Si-N,were prepared by magnetron sputtering on soft stainless steel substrates.They failed in the same way during the scratch test,i.e.,along the brim of scratch,cracking and spalling took place throughout the test,but at the center,cracking appeared first,then partial spalling and finally massive spalling occurred.In contrast,for submicron-thickness(0.5μm) DLC coatings,cracking and spalling occurred at the center appeared from the very beginning of the scratch.The intensity and frequency of acoustic emission peaks correlated to the scale of cracking and spalling in the thick coatings,but this was not the case for DLC coatings of sub-micron thickness.
中图分类号 TB302.3
所属栏目 试验研究
基金项目 国家自然科学基金资助项目(50601018)
收稿日期 2007/9/25
修改稿日期 2008/1/10
网络出版日期
作者单位点击查看
备注杨杰(1982-),男,上海人,硕士研究生.
引用该论文: YANG Jie,SHEN Yao,CAI Xun. Failure Mode of Micron-thickness Hard Coatings on Soft Substrate in Scratch Test[J]. Materials for mechancial engineering, 2008, 32(10): 1~3
杨杰,沈耀,蔡珣. 微米级硬膜软基系统在划痕试验中的破坏方式[J]. 机械工程材料, 2008, 32(10): 1~3
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参考文献
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【2】Burnett P J,Rickerby D S.The relationship between hardness and scratch adhesion[J].Thin Solid Films,1987,154:403-416.
【3】Steinmann P A,Tardy Y,Hintermann H E.Adhesion testing by the scratch test method:The influence of intrinsic and extrinsic parameters on the critical load[J].Thin Solid Films,1987,154:333-349.
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【6】Bull S J.Failure mode maps in the thin film scratch adhesion test[J].Tribology International,1997,30(7):491-498.
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