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金刚石微粉表面的纳米硅烷化改性及其抗氧化性能

庞爱红 董欣然 董俊言 沈方韧 谭素玲 贾晨超 董书山 毛青青 吴增凤

庞爱红, 董欣然, 董俊言, 沈方韧, 谭素玲, 贾晨超, 董书山, 毛青青, 吴增凤. 金刚石微粉表面的纳米硅烷化改性及其抗氧化性能[J]. 金刚石与磨料磨具工程, 2022, 42(4): 410-420. doi: 10.13394/j.cnki.jgszz.2022.0100
引用本文: 庞爱红, 董欣然, 董俊言, 沈方韧, 谭素玲, 贾晨超, 董书山, 毛青青, 吴增凤. 金刚石微粉表面的纳米硅烷化改性及其抗氧化性能[J]. 金刚石与磨料磨具工程, 2022, 42(4): 410-420. doi: 10.13394/j.cnki.jgszz.2022.0100
PANG Aihong, DONG Xinran, DONG Junyan, SHEN Fangren, TAN Suling, JIA Chenchao, DONG Shushan, MAO Qingqing, WU Zengfeng. Nano silylation modification of diamond powder surface and its oxidation resistance[J]. Diamond & Abrasives Engineering, 2022, 42(4): 410-420. doi: 10.13394/j.cnki.jgszz.2022.0100
Citation: PANG Aihong, DONG Xinran, DONG Junyan, SHEN Fangren, TAN Suling, JIA Chenchao, DONG Shushan, MAO Qingqing, WU Zengfeng. Nano silylation modification of diamond powder surface and its oxidation resistance[J]. Diamond & Abrasives Engineering, 2022, 42(4): 410-420. doi: 10.13394/j.cnki.jgszz.2022.0100

金刚石微粉表面的纳米硅烷化改性及其抗氧化性能

doi: 10.13394/j.cnki.jgszz.2022.0100
详细信息
    作者简介:

    庞爱红,女,1973年生,助理工程师。主要研究方向:金刚石、金刚石微粉生产、加工、研发等。E-mail:holddiamond@163.com

    通讯作者:

    董书山,男,1966年生,副教授。主要研究方向:超硬功能材料、超硬制品用金属预合金粉末及高性能超硬制品。E-mail:dongss@jlu.edu.cn

  • 中图分类号: TQ164

Nano silylation modification of diamond powder surface and its oxidation resistance

  • 摘要: 采用溶胶−凝胶技术和正硅酸乙酯(TEOS)的水解−缩合反应,在金刚石微粉表面包覆一层厚度为2~10 nm的富含活性氧基团的纳米氧化硅非晶凝胶膜,凝胶膜在加热至一定温度后,其二氧化硅可由非晶相向晶体相转变。金刚石微粉在空气中的初始氧化温度从原料金刚石的500 ℃提升到其TEOS覆膜改性后的550 ℃。在TEOS覆膜中添加纳米硅粉改性后,金刚石微粉样品在空气中的初始氧化温度可进一步提升至610 ℃;且经过800 ℃的热处理后,样品剩余量比之原料金刚石量大幅度提升,表明TEOS覆膜中添加纳米硅粉后可进一步提升金刚石微粉的高温抗氧化性能。TEOS覆膜中富含的活性氧基团能与树脂/陶瓷结合剂间产生化学反应,有利于提高结合剂对金刚石的把持力,可为制备高性能的树脂/陶瓷结合剂金刚石工具提供良好的功能化改性原材料。

     

  • 图  1  分散处理后的D-Ⅰ和D-Ⅱ微粉SEM形貌及其表面EDS能谱

    Figure  1.  SEM morphologies and surface EDS spectra of dispersed D-Ⅰ and D-Ⅱ powders

    图  2  D-Ⅲ微粉表面SEM形貌及选区EDS能谱

    Figure  2.  SEM morphology and selected area EDS spectroscopy of D-Ⅲ micropowder surface

    图  3  D-Ⅰ和D-Ⅱ金刚石微粉的XRD图谱

    Figure  3.  XRD spectra of D-Ⅰ and D-Ⅱ diamond powders

    图  4  D-Ⅲ金刚石微粉和纳米硅粉的XRD图谱

    Figure  4.  XRD spectrum of D-Ⅲdiamond powers and nano-Si powders

    图  5  D-Ⅱ及D-Ⅲ金刚石微粉的TEM、HRTEM及TEM能谱分析结果

    Figure  5.  TEM, HRTEM and TEM energy spectrum analysis results of D-Ⅱ and D-Ⅲ diamond powders

    图  6  D-Ⅰ金刚石微粉的TG及DSC测试结果

    Figure  6.  TG and DSC results of D-Ⅰ diamond powders

    图  7  D-Ⅱ金刚石微粉的TG及DSC测试结果

    Figure  7.  TG and DSC results of D-Ⅱ diamond powders

    图  8  D-Ⅲ金刚石微粉的TG及DSC测试结果

    Figure  8.  TG and DSC results of D-Ⅲ diamond powders

    图  9  差热分析后的D-Ⅱ及D-Ⅲ样品的XRD图谱

    Figure  9.  XRD patterns of D-Ⅱ and D-Ⅲ samples after differential thermal analysis

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出版历程
  • 收稿日期:  2022-06-28
  • 修回日期:  2022-07-22
  • 刊出日期:  2022-08-16

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