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.
References
[1]
N. Funayama and J. Matsuda, “Development of High- Performance cBN and Diamond Grinding Wheels for High-Speed Grinding,” New Diamond and Frontier Carbon, Vol. 15, No. 4, 2005, pp. 173-180.
[2]
S. Sano, M. Iwai, T. Uematsu and K. Suzuki, “Application of Polycrystalline Diamond (PCD) to EDM,” Japan Society of Electrical-Machining Engineers, Vol. 42, No. 100, 2008, pp. 65-72. doi:10.2526/jseme.42.65
[3]
W. Ensinger, “Formation of Diamond-Like Carbon films by Plasma-Based Ion Implantation and Their Characterizations,” New Diamond and Frontier Carbon, Vol. 16, No. 1, 2006, pp. 1-31.
[4]
W. Z. Shao, V. V. Ivanovb, L. Zhena, Y. S. Cuia and Y. Wanga, “A Study on Graphitization of Diamond in Copper/Diamond Composite Materials,” Materials Letters, Vol. 58, No. 1-2, 2004, pp. 146-149.
doi:10.1016/S0167-577X(03)00433-6
[5]
Y. Chen, X. Jia, G. Zhao and X. Wang, “Facile Preparation of Cubic Calcium Carbonate Nanoparticles with Hydrophobic Properties via a Carbonation Route,” Powder Technology, Vol. 200, No. 3, 2012, pp. 144-148.
doi:10.1016/j.powtec.2010.02.017
[6]
K. Mizuuchi, K. Inoue, Y. Agari, S. Yamada, M. Sugioka, M. Itami, M. Kawahara and Y. Makino, “Consolidation and Thermal Conductivity of Diamond Particle Dispersed Copper Matrix Composites Produced by Spark Plasma Sintering (SPS),” Journal of the Japan Institute of Metals, Vol. 71, No. 11, 2007, pp. 1066-1069.doi:10.2320/jinstmet.71.1066
[7]
M. Petrovic, A. Ivankovic and N. Murphy, “The Mechanical Properties of Polycrystalline Diamond as a Function of Strain Rate and Temperature,” Journal of the European Ceramic Society, Vol. 32, No. 12, 2012, pp. 3021- 3027. doi:10.1016/j.jeurceramsoc.2012.03.026
[8]
A. Nakahira and K. Niihara, “Sintering Behaviors and Consolidation Process for Al2O3/SiC Nanocomposites,” Journal of the Ceramic Society of Japan, Vol. 100, No. 1160, 1992, pp. 448-453. doi:10.2109/jcersj.100.448
[9]
T. Ohji, A. Nakahira, T. Hirano and K. Niihara, “Tensile Creep Behavior of Aalumina/Silicon Carbide Nanocomposites,” Journal of the American Ceramic Society, Vol. 77, No. 12, 1994, pp. 3259-3262.
doi:10.1111/j.1151-2916.1994.tb04580.x
[10]
A. Nakahira, H. Tamasa and K. Niihara, “Microstructure and Mechanical Properties for TiAl-Based Nanocomposites,” Japan Society of Powder and Powder Metallurgy, Vol. 41, No. 6, 1994, pp. 514-518.
