HIP Production of Diamond-SiC Composite and Its Application to High-Pressure In-Situ X-Ray Experiments
Osamu OHTAKA, Ken-ichi FUNAKOSHI and Masaru SHIMONO
Abstract:Diamond-SiC composites were produced from diamond and Si powders by reaction synthesis using a hot isostatic pressing (HIP) technique. At an HIP condition of 1450 and 100 MPa, which pressure is much lower than that of the diamond stability fieldC diamond powders react with molten Si to form well-sintered diamond-SiC composites. Using the cubes of the composites thereby fabricatedC an application to the second stage anvils in the Kawai-type multi-anvil high-pressure apparatus was attempted. Because the diamond-SiC composites are transparent to X raysC the present anvils can be employed not only for conventional energy dispersive X-ray diffraction studies but also for angle dispersive diffraction and radiographic studies that need a larger window for X-ray images. In this paperC our recent advances in the HIP production of diamond-SiC composites and their applications to high-pressure anvils for the Kawai-type multi-anvil high-pressure apparatus were reported. Key Words:Diamond composites, SiC, HIP, Sintering, High-pressure anvils, Synchrotron radiation, Multi-anvil press, X-ray diffraction, X-ray radiography