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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 2. Отображено 2.
24-09-2014 дата публикации

Preparation method for diamond/copper-based composite material

Номер: CN104060117A
Автор: LUO GUOQIANG, LIU RUXIA, ZHANG LIANMENG, SHEN QIANG, LI MEIJUAN, WANG CHUANBIN, CHEN FEI
Принадлежит:

The invention relates to the field of diamond/copper-based composite materials and preparation technologies thereof, and specifically discloses a diamond/copper-based composite material and a preparation method thereof. Mass fraction of the diamond in the composite material is 20%-50%, and diamond particles are uniformly distributed in a matrix. The specific preparation method comprises the following steps: firstly, preparing copper-coated titanium-coated diamond composite powder; then, mixing the copper-coated titanium-coated diamond composite powder with copper powder to form mixed powder; and finally, preparing a sintering test sample with high compactness by surface activating and plasma activating and sintering. The plasma activating and sintering process is as follows: a heating rate is 50-200 DEG C/min, vacuum degree is not greater than 10Pa, pressure applied while sintering is 30-40 MPa, a sintering temperature is 800-900 DEG C, and a heat preserving time is 5-7 minutes. The prepared ...

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Номер записи: 1
13-08-2014 дата публикации

Preparation method of high heat-conducting diamond/copper-based composite material

Номер: CN103981382A
Автор: LUO GUOQIANG, LIU RUXIA, SHEN QIANG, ZHANG LIANMENG, WANG CHUANBIN, LI MEIJUAN
Принадлежит:

The invention relates to a preparation method of a high heat-conducting diamond/copper-based composite material which consists of matrix copper, diamond powder and a molybdenum coating, wherein the volume fraction of molybdenum is 1-2%, the balance of diamond particles and copper. In diamond and copper, the volume fraction of the diamond powder is 15-50%. The preparation method provided by the invention can solve the problem that in methods of infiltration, powder metallurgy and the like, diamond powder and copper are non-wetting to lead to sintering densification. The preparation method comprises the following steps: I, plating molybdenum on the surfaces of the diamond particles by adopting a magnetron sputtering method to prepare molybdenum-coated diamond powder; II, plating copper on the surface of the molybdenum-coated diamond powder by a chemical plating method to prepare copper and molybdenum-coated diamond powder; III, mixing the composite powder obtained in step II and pure copper ...

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Номер записи: 2