| 摘要 |
<p>1,052,636. Powder metallurgy. DUNLOP RUBBER CO, Ltd. Aug. 7, 1963 [Aug. 16, 1962], No.31413/62. Headings C7A and C7D. [Also in Division C3] A friction element for use in brakes or clutches comprises silicon nitride dispersed in a matrix. The matrix may be a resin (see Division C3) or a metal or alloy (e. g. Fe, Cu, Ni, Co, Mn with or without Sn, Zn, Pb, Bi and Sb or alloys of these elements). Friction modifiers such as molybdenum disulphide, graphite, cuprous sulphide, metal phosphides, borides of carbon manganese or titanium, silica, aluminium ortho phosphate, magnesium or manganese pyrophosphate or inorganic fibrous materials may be added in an amount of 1-25% by weight. The friction elements may be made by sintering silicon nitride powder or agglomerates with the metal powder with or without the friction modifiers. Silicon powder and metal powder may be sintered in a nitrogen or ammonia atmosphere. A porous sintered body may be impregnated with resins, metals or metalloids.</p> |
