Beihang University

Beijing Goldwind Science & Creation Windpower Equipment Co., Ltd.

Guoqing Wu

Kai Wu

Zheng Huang

Xiaoqian Li

Pengpeng Zhou

Zhiyan Li

Jiaqi Zhao

Qingqing Zhang

Hai Nan

This invention disclosed a method for preparing the ultrafine intermetallic particles reinforced metal matrix composites (MMC). The particle size of ultrafine intermetallic particles is about 0.01&#x2dc;5 &#x3bc;m. In this method, intermetallic particles and metal matrix were first ball milled together to get the mixed powder. Then, powders were cold-pressed then vacuum melting with metals to prepare the reinforced metal matrix composites materials. The intermetallic particles addition amount in this is 1&#x2dc;30 wt %. This invention improve the dispersion properties of intermetallic particles while increase the particle/matrix interface strength. The ultrafine intermetallic particles reinforced MMC shows the very good performance with good ductility and strength.

Intermetallic compound ultrafine particle reinforced metal-based composite material and preparation method thereof

This invention publishes a method to prepare CaO-based ceramic cores used in investment casting applications. This method claims to use the rare earth oxide to coat the CaO core surface; later the coated cores are shaped then sintered to get the final products. CaO based core was made by 5&#x2dc;15 wt % plasticizer, 0.001&#x2dc;20 wt % mineralizer and the rare earth-coated CaO powders to balance for total 100%. This preparation method can solve the CaO core water absorption problems during core manufacturing, shipping and storage process while improve the core chemical inertness and mechanical properties.

Calcium oxide-based ceramic core and preparation method thereof

A cooling system and method for a wind power generator and a wind power generator set. The cooling system for a wind power generator includes air extraction pipelines and air discharge devices. The air extraction pipelines are located inside a generator case. A pipeline inlet in communication with a generator, a first pipeline outlet in communication with the outside of the generator case, and a second pipeline outlet in communication with the inside of the generator case are arranged on the air extraction pipelines, and the first and second pipeline outlets are provided with air doors.

Cooling system and method for wind power generator and wind power generator set

Growing community of inventors

Beijing, China

Guoqing Wu