评价强界面涂层界面结合能力的横截面压入法

表面技术 , 2006, 35(6): 1-4. doi: 10.3969/j.issn.1001-3660.2006.06.001

评价强界面涂层界面结合能力的横截面压入法

张国祥 ^1, , 张坤 ^2, , 陈光南 ^3, , 罗耕星 ^4, , 肖京华 ^5,

1.中国科学院力学研究所,北京,100080;山东理工大学,山东,淄博,255000中国科学院研究生院,北京,100080;中国科学院研究生院,北京,100080

2.中国科学院力学研究所,北京,100080

3.中国科学院力学研究所,北京,100080

4.中国科学院力学研究所,北京,100080

5.中国科学院力学研究所,北京,100080

基金项目: 国家自然科学基金(50471087;50531060)

关键词：横截面压入法 , 强界面 , 界面结合能力

Cross-sectional Indentation Method to Evaluate Strong Interface Adhesive Strength

为了解强界面脆性涂层/硬性金属基体涂层结构横截面压入时的涂层剥落特点,以电镀铬层/硬性金属基体为研究模型,在原位观察系统下进行横截面压入试验,其结果表明:铬层断裂和剥落与载荷-位移曲线上出现的3个载荷下降点相对应,首先是在铬层横截面上形成一条与压头轴线平行的中间裂纹;随后又出现了以第1条裂纹为对称轴的2条斜裂纹;随着3条裂纹的稳态扩展和汇合,形成了与周围铬层相隔离、仅靠基体支撑的2块1/4圆形局部"孤岛"铬层;最后"孤岛"铬层沿界面剥落.以此"孤岛" 剥落为力学计算模型,提出定量评价强界面脆性涂层/硬性金属基体的界面结合能力的横截面压入法,该方法利用载荷-位移曲线计算"孤岛"剥落所需要的总能量,测量界面剥落面积,并计算两者的比值,给出临界界面能量释放率,以此数据作为评价界面结合能力的指标,并给出了应用举例.

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