Residual Stresses in Sintered Diamond-Cobalt Composites
Manufacturing diamond-cobalt composites by sintering results in residual stresses due to the mismatch of thermal expansion coefficients mainly. To understand the influence of manufacturing process parameters on residual stresses of sintered diamond-cobalt composites samples are produced by different process parameters. The investigated diamond composites are pressureless sintered as well as pressureless sintered combined with hot isostatically pressing. Here the influence of powder characteristics and process parameters like compaction pressure and sintering temperature on the residual stresses and microstructure was analysed by X-ray diffraction, microscopy and tomography. The aim of this study is to correlate residual stresses with manufacturing parameters and to give hints for optimising the residual stress state and for improving the lifetime of diamond-cobalt composites.
W. Reimers and S. Quander
H.A. Crostack, U. Selvadurai-Lassl, W. Tillmann, M. Gathen, C. Kronholz, T. Wroblewski, A. Rothkirch, "Residual Stresses in Sintered Diamond-Cobalt Composites", Materials Science Forum, Vols. 524-525, pp. 787-792, 2006