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发明公开
CN103666005A 镍包膨润土或硅藻土复合粉末及其制备方法 无效 - 驳回

镍包膨润土或硅藻土复合粉末及其制备方法
摘要：
本发明公开了一种镍包膨润土或硅藻土复合粉末及其制备方法，属于热喷涂材料制备领域，该复合粉末由镍包覆在膨润土或硅藻土表面形成，粉末粒度为45～150微米，复合粉末中镍的质量百分含量为50%～80%，该复合粉末镍含量可调。制备过程为：首先对膨润土或硅藻土进行除水及活化处理；其次采用高压氢还原方法进行镍包覆；采用以上方法制备的镍包膨润土或硅藻土复合粉末颗粒均匀，镍含量及包覆厚度可调，包覆完整连续，反应速度快。镍包膨润土或硅藻土主要作为一种航空、航天领域热喷涂粉末材料的核心粉末，也可直接作为热喷涂粉末材料。本发明的制备方法简单，重复性好，易于实现工业化，且生产规模可根据需要进行任意调整。
摘要（英）：

The invention discloses nickel-coated bentonite or diatomite composite powder and a preparation method thereof and belongs to the field of preparation of a thermal spraying material. The composite powder is formed by coating the surface of bentonite or diatomite with nickel, and the powder size is 45-50 micrometers. The mass percentage of nickel in the composite powder is 50-80 percent, and the content of nickel in the composite powder can be adjusted. The preparation method comprises the following steps: dewatering and activating bentonite or diatomite, and then adopting a high-pressure hydrogen reduction method to conduct nickel coating. The nickel-coated bentonite or diatomite composite powder prepared by the method has uniform particles, the content of nickel and the coating thickness can be adjusted, the coating is complete and continuous, and the reaction speed is high. The nickel-coated bentonite or diatomite is mainly used as core powder of the thermal spraying powder material in the aviation and aerospace fields and can also be directly used as the thermal spraying powder material. The preparation method is simple, has high repeatability, and is easy for realizing industrialization, and the production scale can be freely adjusted as required.

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