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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 4. Отображено 4.
23-06-2023 дата публикации

Layered metal with high strength, toughness and low resistivity and preparation method thereof

Номер: CN116288567A
Автор: YI JUN, HU KAI, HUANG BO, BIAN XILEI, JIA YANDONG, WANG GANG
Принадлежит:

The invention relates to a layered metal with high strength and toughness and low resistivity and a preparation method thereof, the metal is formed by alternating a layer of large grain layer and a layer of small grain layer, layer interfaces belong to metallic bond combination, the large grain layer and the small grain layer both show heterogeneous distribution of bimodal grains, the dislocation density in the grains is extremely low and is smaller than 1.1 * 10 < 7 >/dm <-2 >, and the thickness of the layered metal is larger than that of the small grain layer. And d is the grain size. The preparation of the layered metal material is realized by utilizing the alternately changed current density, and the layered metal material with the twin crystal structure is prepared under the action of high-speed rotation of a cathode and shear stress between a deposition product and an electrolyte in the electroplating process. And recrystallizing and annealing the twin crystal layered metal material ...

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Номер записи: 1
23-06-2023 дата публикации

SAC105 solder alloy and preparation method thereof

Номер: CN116275686A
Автор: BIAN XILEI, GAO YAXIN, WANG GANG, QIU XINGBAO, YI JUN, JIA YANDONG
Принадлежит:

The invention relates to an SAC105 solder alloy and a preparation method thereof. The formula of the alloy comprises 1% of Ag, 0.5% of Cu, 0 lt, 0% of SAC105 and the balance of SAC105. Sblt; 4%, 0 lt; inlt; 5%, 0 lt; nilt; 1%, 0 lt; bilt; 3%, and the balance of Sn and inevitable impurities. Compared with the prior art, the Sn-Ag-Cu solder alloy has the advantages that the problem that intermetallic compounds such as Cu6Sn5 and Ag3Sn in a traditional SAC105 system are thick and large, and consequently the strength of a welding joint is low is effectively solved, the strength of the SAC105 alloy can be greatly improved, the high elongation rate can be kept, and the Sn-Ag-Cu solder alloy with the excellent performance is obtained.

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Номер записи: 2
28-07-2023 дата публикации

Preparation method of nanocrystalline immiscible alloy

Номер: CN116497316A
Автор: YI JUN, LIANG WEN, HUANG BO, BIAN XILEI, JIA YANDONG, WANG GANG
Принадлежит:

The invention relates to a preparation method of a nanocrystalline immiscible alloy, which is characterized in that the nanocrystalline immiscible alloy is directly prepared by a physical vapor deposition method, or an amorphous state immiscible alloy with a certain thickness is prepared by the physical vapor deposition method, and then amorphous state is crystallized into nanocrystalline by an annealing process. And thus, the preparation of the nanocrystalline immiscible alloy is completed. Compared with the prior art, the nanocrystalline immiscible alloy prepared through the method has the advantages of being high in density, heat conductivity and electric conductivity, equipment used in the method is industrial universal equipment, and the method is economical, practical and suitable for industrial mass production.

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Номер записи: 3
25-07-2023 дата публикации

Bulk metallic glass stepping cyclic loading rejuvenation method

Номер: CN116479348A
Автор: YI JUN, HUANG HAORAN, HUANG BO, BIAN XILEI, JIA YANDONG, WANG GANG
Принадлежит:

The invention relates to a bulk metallic glass stepping cyclic loading rejuvenation method. The method comprises the following steps: 1) processing metallic glass into a sample which can be subjected to cyclic loading treatment; and 2) mounting the sample on cyclic loading equipment, carrying out step-by-step cyclic loading treatment by adopting an alternating load, starting from an initial stress amplitude lower than a fatigue limit, and after certain cyclic loading times, increasing a step stress amplitude to carry out cyclic loading until the sample is fractured. Compared with the prior art, the method disclosed by the invention is high in efficiency, simple in process and strong in universality, and has a very good application prospect for regulating and controlling the energy state and the performance of the metal glass structure.

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Номер записи: 4