C/C composites with refractory metal compounds were prepared by liquid impregnation, the distribution state of refractory metal grain was observed by optical microscope and surface scan.
利用液相浸渍法制备了含有难熔金属化合物的C/C复合材料，通过金相显微镜、面扫描观察了难熔金属颗粒在材料中的分散状态；
The results show that gold extraction cost can be decreased through static state oxidation and cyanide leaching to refractory at suitable conditions.
结果表明，在适宜条件下，对金精矿进行静态氧化、氰化浸出，有助于降低生产成本。
Technical progress of refractory metal single crystal processing was introduced and state of the art of single crystal preparation was summarized;
综述了当前难熔金属单晶制备的技术现状，介绍了难熔金属单晶技术进展，并对难熔金属合金单晶前景进行了展望。
Technical progress of refractory metal single crystal processing was introduced and state of the art of single crystal preparation was summarized;
综述了当前难熔金属单晶制备的技术现状，介绍了难熔金属单晶技术进展，并对难熔金属合金单晶前景进行了展望。
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