Heat conduction composite with high temperature resistance

摘要

Heat conduction composite with high temperature resistance between hot and cooled surface is formed by at least two components, one component is formed by elongated segments (1) having melting temperature higher than 1300 øC; the segments are separated by filler (2) having higher temperature conductivity and temperature dilatability, which is in direct contact with cooling media in a channel (3). Both the components are in direct contact with hot environment surrounding the composite, where the overall surface formed by the segments (1) constitutes 50 % to 95 % of the hot composite total surface. The longitudinal axis of the segment(1) is in preference oriented in the direction of the shortest abscissa connecting the hot surface with the cooled surface of the composite with a variation up to 45ø, wherein in the direction from hot to cooled surface might intersect at most one interface between the components. The material of the segments can be wolfram, advantageously wolfram with an admixture of La2O3 and/or Y2O3 and/or CeO2, and/or ThO2, and/or ZrO2. The matrix, filler (2) can be copper, silver, or alloys thereof.