Cr与金刚石界面碳化物形成机理研究 |
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引用本文: | 邵浩明,;王进保,;李东平. Cr与金刚石界面碳化物形成机理研究[J]. 珠宝科技, 2008, 0(1): 19-21 |
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作者姓名: | 邵浩明, 王进保, 李东平 |
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作者单位: | [1]国家特种矿物材料工程技术研究中心,广西桂林541004; [2]桂林矿产地质研究院,广西桂林541004 |
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基金项目: | 广西壮族自治区科技厅应用基础研究专项资助项目(桂科基0731006) |
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摘 要: | 选用含Cr活性钎料,适当控制钎焊工艺,实现了金刚石与基体的高强度连接。采用扫描电子显微镜(SEM)和能谱仪(EDS)及X射线衍射结构(XRD)分析了真空加热条件下,含铬活性钎料与金刚石之间的界面反应以及界面反应产物,探讨了钎料与金刚石界面处碳化物的形成机理。分析结果表明,活性钎料中的Cr在金刚石表面富集并与金刚石中的C生成枝状的碳化物,既实现了化学冶金结合,生成的碳化物呈枝状,也进一步加强了对金刚石的把持作用。
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关 键 词: | 金刚石 钎焊 枝状碳化物 化学冶金结合 |
Research on formation mechanism of carbonide transition layer at the diamond interface with Cr |
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Affiliation: | SHAO Hao-ming, WANG Jin-bao, LI Dong-ping (1. National Special Mineral Materials Engineering Research Center, Guilin, Guangxi 541004 ,China ; 2. Guilin Research Institute of Geology for Mineral Resources,Guilin,Guangxi 541004, China) |
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Abstract: | The high strength bonding between diamond grit and base steel was realized by using a Cr-based active brazing filler metal under controlled brazing conditions. The interface between the Cr-based filler metal and diamond grit was analyzed by using scanning electronic microscope, energy dispersive X-ray spectroscopy and X-ray diffraction. The formation mechanism of carbide layers was discussed. Testing results show that the Cr element in the filler metal is accumulated onto diamond surface and reacts with C element to form ramiform carbide. As a result, metallurgical bonding is produced between the filler metal and the diamond grit. The form of ramiform carbide also strengthens the bonding strength between the base steel and diamond. |
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Keywords: | diamond brazing ramiform carbide metallurgical bond |
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