HIP-Sintered Composites of C (Diamond)/SiC

Diamond (carbon) and silicon powders were mixed and HIPed under temperatures of 1300°–1500°C and pressure at 50 MPa for 30 min. When heated at >1300°C, the products were >90% sintered compacts. Density and bending strength were measured. The highest values of 3.3 g/cm3 and 750 MPa were obtaine...

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Veröffentlicht in:Journal of the American Ceramic Society 2004-04, Vol.87 (4), p.752-755
Hauptverfasser: Shimono, Masaru, Kume, Shoichi
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container_title Journal of the American Ceramic Society
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creator Shimono, Masaru
Kume, Shoichi
description Diamond (carbon) and silicon powders were mixed and HIPed under temperatures of 1300°–1500°C and pressure at 50 MPa for 30 min. When heated at >1300°C, the products were >90% sintered compacts. Density and bending strength were measured. The highest values of 3.3 g/cm3 and 750 MPa were obtained when the starting material was a mixture of fine and coarse‐grained diamond and silicon powder. The photomicrograph of polished surface of the product revealed that it consisted primarily of two types of substances with few pores. XRD showed the coexistence of diamond and SiC. No trace of conversion reaction from diamond to graphite was seen, although the sample was treated under conditions in which diamond was thermodynamically metastable. The summarized results suggest that the HIP process can be a useful way to synthesize diamond/SiC composites.
doi_str_mv 10.1111/j.1551-2916.2004.00752.x
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When heated at &gt;1300°C, the products were &gt;90% sintered compacts. Density and bending strength were measured. The highest values of 3.3 g/cm3 and 750 MPa were obtained when the starting material was a mixture of fine and coarse‐grained diamond and silicon powder. The photomicrograph of polished surface of the product revealed that it consisted primarily of two types of substances with few pores. XRD showed the coexistence of diamond and SiC. No trace of conversion reaction from diamond to graphite was seen, although the sample was treated under conditions in which diamond was thermodynamically metastable. 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source Wiley Online Library Journals Frontfile Complete
subjects Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Cermets, ceramic and refractory composites
Chemical industry and chemicals
Composite materials
Cross-disciplinary physics: materials science
rheology
Diamonds
Exact sciences and technology
hot isostatic pressing
Materials science
Miscellaneous
Other materials
Physics
silicon
silicon carbide
Sintering
Specific materials
Technical ceramics
title HIP-Sintered Composites of C (Diamond)/SiC
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