| Ni-Cr合金保护气氛钎焊金刚石界面Cr7C3的形核与长大 |
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| 引用本文： | 卢金斌,孟普,樊平,郭建.Ni-Cr合金保护气氛钎焊金刚石界面Cr7C3的形核与长大[J].焊接学报,2012,33(9):65-68. |
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| 作者姓名： | 卢金斌 孟普 樊平 郭建 |
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| 作者单位： | 1. 中原工学院材料与化工学院,郑州450007 郑州机械研究所新型钎焊材料与技术国家重点实验室,郑州450052
2. 中原工学院材料与化工学院,郑州,450007 |
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| 基金项目： | 河南省教育厅科技攻关资助项目，新型钎焊材料国家重点实验室开放课题 |
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| 摘 要： | 采用Ni-Cr合金在保护气氛炉中进行钎焊单晶金刚石磨粒试验,使用SEM对Ni-Cr合金钎焊金刚石界面碳化物、断口形貌、钎缝组织进行观察分析,采用XRD对钎焊后金刚石进行物相分析.结果表明,在保护气氛炉中进行钎焊可以实现金刚石的高强度连接,钎焊后金刚石棱角清晰、形貌完好.金刚石的表面生成具有方向性的Cr3C2,Cr3C2的生长方向与金刚石(111)晶面有一定的位向关系,与其所在晶面六边形的边平行,Cr7C3全部在Cr3C2上形核长大,最后形成外层是Cr7C3,内层是具有方向性的Cr3C2.
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| 关 键 词： | 保护气氛钎焊 金刚石 Cr7C3 形核 |
| 收稿时间： | 2011/7/4 0:00:00 |
Nucleation and growth of Cr_7C_3 at interface of brazed diamond with Ni-Cr alloy under protective atmosphere |
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| LU Jinbin,MENG Pu,FAN Ping and GUO Jian.Nucleation and growth of Cr_7C_3 at interface of brazed diamond with Ni-Cr alloy under protective atmosphere[J].Transactions of The China Welding Institution,2012,33(9):65-68. |
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| Authors: | LU Jinbin MENG Pu FAN Ping and GUO Jian |
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| Affiliation: | 1(1.Department of Materials and Chemical Engineering,Zhongyuan University of Technology,Zhengzhou 450007,China;2.State Key Laboratory of New Type Brazing Alloy and Technology,Zhengzhou Research Institute of Mechanical Engineering,Zhengzhou 450052,China) |
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| Abstract: | In protective atmosphere furnace, mono-crystalline diamond was brazed with Ni-Cr alloy, the morphology of the carbide formed on the surface of diamond, fracture appearance and microstructures of the brazed seam were analyzed with scanning electron microscope and XRD.The results show that the diamond brazed in protective atmosphere furnace can realize high strength bonding.The brazed diamond has distinct edge and intact morphology.On the surface of the diamond, the arrangement of Cr3C2 is regular, the growth directions take on certain orientation relationship with the(111) crystal planes of diamond.All of Cr7C3 nucleate and grow on the surface of Cr3C2.Finally, the exothecium Cr7C3 and regular arrangement endothecium Cr3C2 were formed. |
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| Keywords: | protective atmosphere brazing diamond Cr7C3 nucleation |
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