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熔盐法合成Ti和TiC镀覆层对金刚石热稳定性的影响

武玺旺 皇甫战彪 刘雪坤 蔡玉乐 王良文 程学瑞

武玺旺, 皇甫战彪, 刘雪坤, 蔡玉乐, 王良文, 程学瑞. 熔盐法合成Ti和TiC镀覆层对金刚石热稳定性的影响[J]. 金刚石与磨料磨具工程, 2023, 43(2): 196-201. doi: 10.13394/j.cnki.jgszz.2022.0054
引用本文: 武玺旺, 皇甫战彪, 刘雪坤, 蔡玉乐, 王良文, 程学瑞. 熔盐法合成Ti和TiC镀覆层对金刚石热稳定性的影响[J]. 金刚石与磨料磨具工程, 2023, 43(2): 196-201. doi: 10.13394/j.cnki.jgszz.2022.0054
WU Xiwang, HUANGFU Zhanbiao, LIU Xuekun, CAI Yule, WANG Liangwen, CHENG Xuerui. Effect of Ti and TiC coating on the thermal stability of diamond[J]. Diamond & Abrasives Engineering, 2023, 43(2): 196-201. doi: 10.13394/j.cnki.jgszz.2022.0054
Citation: WU Xiwang, HUANGFU Zhanbiao, LIU Xuekun, CAI Yule, WANG Liangwen, CHENG Xuerui. Effect of Ti and TiC coating on the thermal stability of diamond[J]. Diamond & Abrasives Engineering, 2023, 43(2): 196-201. doi: 10.13394/j.cnki.jgszz.2022.0054

熔盐法合成Ti和TiC镀覆层对金刚石热稳定性的影响

doi: 10.13394/j.cnki.jgszz.2022.0054
基金项目: 国家自然科学基金(12104415);河南省高等学校重点科研项目(21B140011)
详细信息
    作者简介:

    武玺旺,男,1980年生,博士。主要研究方向:超硬材料。E-mail: utherwu@foxmail.com

    通讯作者:

    程学瑞,男,1982年生,博士、教授。主要研究方向:超硬材料。E-mail:xrcheng@zzuli.edu.cn

  • 中图分类号: TG164

Effect of Ti and TiC coating on the thermal stability of diamond

  • 摘要: 金刚石表面金属化处理是提高金刚石制品性能的重要技术手段之一,镀覆层质量对金刚石及其制品的热稳定性和耐磨性都具有重要影响。采用高温熔盐法在金刚石表面成功镀覆Ti和TiC层,利用XRD、SEM对镀覆层的组成和形貌进行表征,并对镀覆后金刚石颗粒的热稳定性进行研究。结果表明:镀覆后金刚石由黄色变为灰黑色,其光学透过率大大降低。在800~900 ℃镀覆时,金刚石表面会形成Ti和TiC复合镀层,但800 ℃时的镀层比较稀疏,甚至出现漏镀现象,而在900 ℃时得到的镀层比较均匀致密;在1 100 ℃镀覆时,镀覆层为TiC,镀覆层较厚而且出现分层、开裂现象。由于镀覆层的保护作用,金刚石的氧化温度增加,失重率大大降低。尤其是在900 ℃时镀覆后,金刚石的失重率由原料的91.3%降至镀覆后的9.3%,热稳定性显著提升。因此,熔盐法合成Ti镀覆层的最佳温度为900 ℃。

     

  • 图  1  镀覆前后金刚石的光学照片

    Figure  1.  Optical photos of diamond before and after coating

    图  2  不同温度镀覆后金刚石颗粒的XRD图谱

    Figure  2.  XRD patterns of the diamonds coated at different temperature

    图  3  不同温度镀覆后金刚石的SEM形貌和EDS能谱图

    Figure  3.  SEM and EDS spectra of diamonds coated

    图  4  镀覆前及不同温度镀覆后金刚石的热重分析

    Figure  4.  Thermogravimetric analysis of diamond before and after plating at different temperatures

    图  5  金刚石镀覆层的结构示意图

    Figure  5.  Schematic diagram of coating structure for diamond

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出版历程
  • 收稿日期:  2022-04-19
  • 修回日期:  2022-06-13
  • 录用日期:  2022-07-12
  • 刊出日期:  2023-04-20

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