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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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Применить Всего найдено 5. Отображено 5.
25-06-2014 дата публикации

TiAl-graphene-Ti3SiC2 self-lubricating composite material and preparation method thereof

Номер: CN103882257A
Автор: ZHANG QIAOXIN, XU ZENGSHI, SHI XIAOLIANG, XUE BING, CHEN LONG, ZHU QINGSHUAI, XIAO YECHENG, ZHAI WENZHENG, YAO JIE, WANG YUFU
Принадлежит:

The invention provides a TiAl-graphene-Ti3SiC2 self-lubricating composite material and a preparation method thereof. The method comprises the following steps: 1) selecting Ti powder and Al powder according to the molar ratio of Ti and Al being 1:(1-1.5); selecting graphene and Ti3SiC2 powder according to the facts that the mass ratio of the graphene and the Ti3SiC2 is 1:4 and adding amount of the graphene and the Ti3SiC2 which are taken as a compound lubricant is 5wt% to 15wt% (weight percent) of the total mass of the Ti powder and the Al powder; and adding the compound lubricant into the mixed matrix powder so as to obtain a compounding material; (2) carrying out dry grinding on the compounding material in a vibrating ball mill for 40 minutes so as to obtain pretreated mixed powder; and 3) putting the pretreated mixed powder into a graphite mould under a vacuum condition by utilizing a discharge plasma sintering process so as to prepare the TiAl-graphene-Ti3SiC2 self-lubricating composite ...

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Номер записи: 1
26-05-2023 дата публикации

Leg and foot unit of walking type intelligent robot

Номер: CN116161135A
Автор: GONG YAMEI, ZHAI WENZHENG, HE JI
Принадлежит:

The invention discloses a leg-foot unit of a walking type intelligent robot. The leg-foot unit comprises a shank and a foot which are connected. A plurality of interlocking rollers are arrayed at the sole of the foot at equal intervals in the front-back direction; the feet comprise a gait walking state and a rolling sliding state; in a gait walking state, the wheel surfaces of any two adjacent interlocking rollers are tightly tangent to each other to form an interlocking state; in the rolling sliding state, any two adjacent interlocking rollers are separated from each other, and the interlocking state is released; the skating type walking robot not only can walk in a pure gait mode, but also can change the state, so that skating type walking can be realized.

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Номер записи: 2
08-07-2015 дата публикации

Novel Ni3Al-based self-lubricating material with MoO3 plate-shaped crystal as lubricating phase and reinforcing phase, and preparation method thereof

Номер: CN104762500A
Автор: SHI XIAOLIANG, ZHAI WENZHENG, ZHANG AO, YANG KANG, XU ZENGSHI, YAO JIE, CHEN LONG, ZHU QINGSHUAI, XIAO YECHENG, ZHANG QIAOXIN, WANG YUFU, WANG ZHIHAI
Принадлежит:

The invention relates to a novel Ni3Al-based self-lubricating material with a MoO3 plate-shaped crystal as a lubricating phase and reinforcing phase, and a preparation method thereof. The preparation method comprises the following steps: preparing the MoO3 plate-shaped crystal; weighing Ni powder and Al powder according to a mol ratio of Ni: Al of 4: 1, weighing the prepared MoO3 plate-shaped crystal accounting for 2.0 to 5.0 wt% of the total mass of the Ni powder and the Al powder and mixing the MoO3 plate-shaped crystal, the Ni powder and the Al powder so as to obtained a charge mixture placing the charge mixture in a vibration mixer for dry mixing so as to obtain a sintered charge mixture; and sintering the sintered charge mixture through spark plasma sintering so as to obtain the novel Ni3Al-based self-lubricating material with the MoO3 plate-shaped crystal as the lubricating phase and reinforcing phase. According to the self-lubricating material, the MoO3 plate-shaped crystal is compounded ...

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Номер записи: 3
02-04-2014 дата публикации

Ti3SiC2-TiC-graphene self-lubricating composite material and in situ synthesis preparation method thereof

Номер: CN103693963A
Автор: SHI XIAOLIANG, ZHAI WENZHENG, XU ZENGSHI, ZHU QINGSHUAI, XIAO YECHENG, CHEN LONG, YAO JIE, SONG SIYUAN, WANG YUFU, FENG SIPING, ZHANG SONG, ZHANG QIAOXIN
Принадлежит:

The present invention relates to a Ti3SiC2-TiC-graphene self-lubricating composite material and an in situ synthesis preparation method thereof. According to the composite material, Ti powder, SiC powder, TiC powder, Al powder and graphene are adopted as raw materials, spark plasma sintering in situ synthesis is adopted, the Al powder is a synthesis accelerating agent, material matching is performed according to a molar ratio of Ti to SiC to TiC to Al is 4:2:1:0.2, and the amount of graphene is 0.1-0.5 wt% of the total mass of the Ti powder, the SiC powder, the TiC powder and the Al powder. According to the present invention, the Ti3SiC2-TiC-graphene self-lubricating composite material is synthesized through the spark plasma sintering in situ synthesis manner so as to eliminate the tedious pretreatment process, reduce the sintering temperature, shorten the sintering time and simplify the preparation process; the prepared Ti3SiC2-TiC-graphene self-lubricating composite material has characteristics ...

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Номер записи: 4
30-04-2014 дата публикации

B2 type NiAl-based self-lubricating composite materials and preparing method thereof

Номер: CN103752819A
Автор: SHI XIAOLIANG, YAO JIE, XU ZENGSHI, ZHAI WENZHENG, SONG SIYUAN, CHEN LONG, ZHU QINGSHUAI, XIAO YECHENG, ZHANG QIAOXIN, WANG YUFU, FENG SIPING, ZHANG SONG
Принадлежит:

The invention provides B2 type NiAl-based self-lubricating composite materials and a preparing method thereof. The method comprises the following steps that (1) Ni powder, Al powder, Mo powder, Nb powder, nano grapheme and WS2 powder are selected according to proportion, and ingredients are obtained; (2) the ingredients are placed in a vibration ball mill for dry grinding, the inner wall of a vibration ball milling tank is made of Teflon, vibration frequency is 45 Hz, amplitude is 5 mm, vibration force is 10000 N, vibration time is 30 minutes-50 minutes, and preprocessed mixed powder is obtained; and (3) the preprocessed mixed powder is placed in a graphite mould with the inner diameter of 20 mm, and then under the vacuum condition, a spark plasma sintering method is used for the B2 type NiAl-based self-lubricating composite materials. The self-lubricating composite materials obtained through the method are high in purity and good in compactness and have good tribology performance. In addition ...

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Номер записи: 5