Sintered Diamond: A Synthetic Carbonado

Science  28 Aug 1970:
Vol. 169, Issue 3948, pp. 868-869
DOI: 10.1126/science.169.3948.868


Diamond powder is rapidly sintered into molded shapes at a pressure of about 65 kilobars and a temperature of 2500° Kelvin. Other conditions of pressure and temperature are also suitable. The product compares favorably with natural carbonado in its properties.