Normal-pressure Hot-pressing of Α-alumina-diamond Composites
α-Alumina-diamond composites have been developed by normal hot-pressing procedures using a conventional pressure of 32 MPa and 1250°C. Heretofore this type of composite has required a pressure of 6 GPa (60 kbar) to prevent the transformation of diamond to graphite. the mechanical properties, density, and thermal expansion coefficient of these composites have been characterized. the fracture toughness (KIc) of alumina shows a considerable increase with the addition of diamond particles. Diamond additions tend to decrease the thermal expansion coefficient of these composites. the composite properties are dependent on the volume fraction of diamond particles.
J. Liu and P. D. Ownby, "Normal-pressure Hot-pressing of Α-alumina-diamond Composites," Journal of the American Ceramic Society, Wiley-Blackwell, Jan 1991.
The definitive version is available at http://dx.doi.org/10.1111/j.1151-2916.1991.tb06817.x
Materials Science and Engineering
Keywords and Phrases
Diamond; Alumina; Composites; Thermal Expansion; Fracture Toughness
Article - Journal
© 1991 Wiley-Blackwell, All rights reserved.