Fabrication of Sintered Diamond/Metal Composites and Evaluation of Grinding Performance for Sapphire

Makoto Inoue, Kenta Yasuda, Tadashi Ito, Tetsu Sasahara, Masaru Yokota, Atsushi Nakahira

Department of Material Science and Engineering, Osaka Prefecture University, Sakai, Japan.
Nakamura Choto Co. Ltd., Sakai, Japan.

DOI: 10.4236/msa.2012.39089                

Abstract

The fabrication of sintered diamond/metal composites bodies composed of diamond filler with the average particle size of 15 μm to 30 μm and metal binder (Ag-Cu-Ti system brazing) was attempted by powder metallurgical sintering process at 700℃ to 1000?C in vacuum atmosphere. As a result, dense bulks of sintered diamond/metal composites were obtained by this powder metallurgical sintering process. The increase of sintering temperatures from 750℃ to 950℃ and of pressure enhanced the density of sintered diamond/metal composites during the hot-pressing in vacuum. All bulks prepared at the temperatures of 750?C to 950℃ were composed of diamond phase and Ag-Cu-Ti system brazing without any other phase for sintered bulks for diamond/metal composites. Furthermore, some properties were evaluated for sintered diamond/metal composites.

Keywords

Diamond; Composite; Brazing; Ag; Microstructure; Grinding

Conflicts of Interest

The authors declare no conflicts of interest.

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