Prestressing method to inhibit crack initiation and expansion in a large-sized diamond film during polishing

• Published in: Diamond and related materials Vol. 144; p. 111022
• Main Authors: An, Kang, Liu, Peng, Zhang, Yongkang, Shao, Siwu, Yang, Zhiliang, Li, Hong, Xu, Guangyu, Zhang, Yachen, Wu, Haiping, Liu, Fengbin, Li, Chengming
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.04.2024
• Subjects: Finite element analysis; Large-sized diamond film polishing; Prefabricated stress; Large-sized diamond film polishing; Prefabricated stress; Finite element analysis

A piece of diamond film (Ø 125 mm) was polished based on prefabricated stress. The diamond film was glued to a metal workpiece at high temperatures. The difference in the thermal expansion coefficients between the diamond film and the workpiece was exploited to prefabricate stress in the middle of t...