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室温脱钴对PCD微观结构及力学性能的影响

张鹏 杨雪峰 陈冰威 黄雷波 骈小璇 栗正新 闫宁 王孝琪 孙冠男 张鹏飞 李志尧 司治华 陈强 宜娟 李金鑫

张鹏, 杨雪峰, 陈冰威, 黄雷波, 骈小璇, 栗正新, 闫宁, 王孝琪, 孙冠男, 张鹏飞, 李志尧, 司治华, 陈强, 宜娟, 李金鑫. 室温脱钴对PCD微观结构及力学性能的影响[J]. 金刚石与磨料磨具工程, 2022, 42(6): 685-691. doi: 10.13394/j.cnki.jgszz.2022.0052
引用本文: 张鹏, 杨雪峰, 陈冰威, 黄雷波, 骈小璇, 栗正新, 闫宁, 王孝琪, 孙冠男, 张鹏飞, 李志尧, 司治华, 陈强, 宜娟, 李金鑫. 室温脱钴对PCD微观结构及力学性能的影响[J]. 金刚石与磨料磨具工程, 2022, 42(6): 685-691. doi: 10.13394/j.cnki.jgszz.2022.0052
ZHANG Peng, YANG Xuefeng, CHEN Bingwei, HUANG Leibo, PIAN Xiaoxuan, LI Zhengxin, YAN Ning, WANG Xiaoqi, SUN Guannan, ZHANG Pengfei, Li Zhiyao, SI Zhihua, CHEN Qiang, YI Juan, LI Jinxin. Effect of room temperature cobalt removal on the microstructure and mechanical properties of PCD[J]. Diamond & Abrasives Engineering, 2022, 42(6): 685-691. doi: 10.13394/j.cnki.jgszz.2022.0052
Citation: ZHANG Peng, YANG Xuefeng, CHEN Bingwei, HUANG Leibo, PIAN Xiaoxuan, LI Zhengxin, YAN Ning, WANG Xiaoqi, SUN Guannan, ZHANG Pengfei, Li Zhiyao, SI Zhihua, CHEN Qiang, YI Juan, LI Jinxin. Effect of room temperature cobalt removal on the microstructure and mechanical properties of PCD[J]. Diamond & Abrasives Engineering, 2022, 42(6): 685-691. doi: 10.13394/j.cnki.jgszz.2022.0052

室温脱钴对PCD微观结构及力学性能的影响

doi: 10.13394/j.cnki.jgszz.2022.0052
详细信息
    作者简介:

    张鹏,男,1997年生,硕士研究生。主要研究方向:磨料磨具,金刚石功能化应用。E-mail:1536438742@qq.com

  • 中图分类号: TQ164

Effect of room temperature cobalt removal on the microstructure and mechanical properties of PCD

  • 摘要: 为提高PCD使用过程中的热稳定性,选用硫酸-过氧化氢混合溶液在室温下对PCD进行脱钴处理,研究其脱钴机理及脱钴对PCD微观结构及力学性能的影响。通过SEM观察到PCD在室温脱钴48 h后表面出现较大深度的腐蚀坑,钴相基本被去除,上下表面脱钴深度分别为176 μm和162 μm;通过EDS可确定脱钴层剩余钴的质量分数为0.93%,而未脱钴层钴的质量分数为7.64%,表明87.83%的钴在实验中被硫酸-过氧化氢混合溶液溶解而去除。对PCD样品进行残余应力测量,脱钴之前的残余压应力为483.91 MPa,脱钴之后的残余压应力为330.35 MPa,后者相对前者减少31.73%,说明脱钴可以有效降低PCD内部残余压应力。

     

  • 图  1  硫酸-过氧化氢溶液的脱钴机理示意图

    Figure  1.  Schematic diagram of cobalt removal mechanism of H2SO4-H2O2 mixed solution

    图  2  PCD在不同放大倍率下未进行脱钴的SEM形貌

    Figure  2.  SEM morphologies of PCD without cobalt removal at different magnifications

    图  3  硫酸-过氧化氢混合溶液脱钴48 h后的SEM形貌

    Figure  3.  SEM morphologies of H2SO4-H2O2 mixed solution after 48 hours of cobalt removal

    图  4  PCD样品未抛光面脱钴48 h后的SEM形貌

    Figure  4.  SEM morphologies of unpolished surface of PCD sample after 48 hcobalt removal

    图  5  48 h脱钴后PCD表面的EDS元素组成

    Figure  5.  EDS element compositions of PCD surface after 48 h cobalt removal

    图  6  PCD样品纵剖面SEM形貌

    Figure  6.  SEM morphologies of longitudinal section of PCD sample

    图  7  48 h脱钴处理后脱钴层的EDS

    Figure  7.  EDS element compositions of cobalt removal layer after 48 h cobalt removal treatment

    图  8  48 h脱钴处理后未脱钴层的EDS

    Figure  8.  EDS element compositions of non cobalt removal layer after 48 h cobalt removal treatment

    图  9  脱钴层至未脱钴层的EDS线扫描图谱

    Figure  9.  EDSline scan map from cobalt removal layer to non cobalt removal layer

    图  10  PCD样品脱钴前后的XRD图谱

    Figure  10.  XRD patterns of PCD samples before and after cobalt removal

    图  11  PCD脱钴前后sin2ψ-2θ图Fig.11 sin2ψ-2θ diagrams before and after PCD cobalt removal

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出版历程
  • 收稿日期:  2022-04-18
  • 修回日期:  2022-07-12
  • 录用日期:  2022-07-25
  • 网络出版日期:  2022-07-25
  • 刊出日期:  2023-01-12

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