| 摘要 |
High density compacts are made by providing a compactable particulate combination of Class 1 metals selected from at least one of Ag, Cu and Al, with material selected from at least one of CdO, SnO, SnO2, C, Co, Ni, Fe, Cr, Cr3C2, Cr7C3, W, WC, W2C, WB, Mo, Mo2C, MoB, Mo2B, TiC, TiN, TiB2, Si, SiC, Si3N4, usually by mixing powders of each, step (1); uniaxially pressing the powders to a density of from 60% to 95%, to provide a compact, step (2); hot densifying the compact at a pressure between 352 kg/cm2 (5,000 psi) and 3,172 kg/cm2 (45,000 psi) and at a temperature from 50 DEG C. to 100 DEG C. below the melting point or decomposition point of the lower melting component of the compact, to provide densification of the compact to over 97% of theoretical density; step (3); and cooling the compact, step (4). |
