高温高压烧结高硬度高致密度块体金属钨及钨基合金W-TiC

陈宏洋 彭放 刘平平 王永坤 段文瑞 刘冬琼 杨兴辉 李春霞 贺端威

陈宏洋, 彭放, 刘平平, 王永坤, 段文瑞, 刘冬琼, 杨兴辉, 李春霞, 贺端威. 高温高压烧结高硬度高致密度块体金属钨及钨基合金W-TiC[J]. 高压物理学报, 2015, 29(4): 255-262. doi: 10.11858/gywlxb.2015.04.003
引用本文: 陈宏洋, 彭放, 刘平平, 王永坤, 段文瑞, 刘冬琼, 杨兴辉, 李春霞, 贺端威. 高温高压烧结高硬度高致密度块体金属钨及钨基合金W-TiC[J]. 高压物理学报, 2015, 29(4): 255-262. doi: 10.11858/gywlxb.2015.04.003
CHEN Hong-Yang, PENG Fang, LIU Ping-Ping, WANG Yong-Kun, DUAN Wen-Rui, LIU Dong-Qiong, YANG Xing-Hui, LI Chun-Xia, HE Duan-Wei. High-Pressure and High-Temperature Sintering of Bulk Tungsten and W-TiC Alloy with Near-Full Densification and High Hardness[J]. Chinese Journal of High Pressure Physics, 2015, 29(4): 255-262. doi: 10.11858/gywlxb.2015.04.003
Citation: CHEN Hong-Yang, PENG Fang, LIU Ping-Ping, WANG Yong-Kun, DUAN Wen-Rui, LIU Dong-Qiong, YANG Xing-Hui, LI Chun-Xia, HE Duan-Wei. High-Pressure and High-Temperature Sintering of Bulk Tungsten and W-TiC Alloy with Near-Full Densification and High Hardness[J]. Chinese Journal of High Pressure Physics, 2015, 29(4): 255-262. doi: 10.11858/gywlxb.2015.04.003

高温高压烧结高硬度高致密度块体金属钨及钨基合金W-TiC

doi: 10.11858/gywlxb.2015.04.003
基金项目: 国家自然科学基金委员会-中国科学院联合基金(U1332104)
详细信息
    作者简介:

    陈宏洋(1991-),男,硕士研究生,主要从事高压下新型材料的合成与表征研究.E-mail: chy89728@yeah.net

    通讯作者:

    彭放(1960-),男,教授,主要从事高压物理及新型复合材料研究.E-mail: pengfang@scu.edu.cn

  • 中图分类号: O521.2

High-Pressure and High-Temperature Sintering of Bulk Tungsten and W-TiC Alloy with Near-Full Densification and High Hardness

  • 摘要: 采用高温高压烧结方法,烧结纯钨和TiC颗粒弥散增强W-TiC合金材料,对钨及W-TiC合金的烧结致密化行为和力学性能进行了研究。结果表明:在压力为5.0 GPa、温度为1 500 ℃的条件下烧结15 min可获得良好的烧结样品,块体钨的致密度达到99.3%,硬度达到6.43 GPa;在相同的高温高压烧结条件下,添加质量分数为1.5%的TiC,获得的W-TiC合金致密度达到99.0%,硬度达到7.58 GPa。极端高压环境不但能抑制钨及钨合金在烧结过程中的晶粒长大,还能降低烧结温度,提高烧结效率,增加烧结体的致密性。在此基础上进一步探索了钨及钨基合金W-TiC的高压烧结动力学、微观结构、机械性能与烧结压力和烧结温度的关系。

     

  • 图  纯钨粉末的XRD谱

    Figure  1.  XRD patterns of pure tungsten powder

    图  纯钨粉末的SEM图像

    Figure  2.  SEM image of pure tungsten powder

    图  样品组装示意图

    Figure  3.  Schematic of the sample assembly

    图  纯钨烧结样品的硬度随烧结温度的变化

    Figure  4.  Relationship between hardness of pure tungsten and sintering temperature

    图  W-TiC合金的硬度随烧结温度的变化

    Figure  5.  Relationship between hardness of W-TiC alloy and sintering temperature

    图  高温高压烧结的W-1.5%TiC合金的SEM图像

    Figure  6.  SEM image of the W-1.5%TiC alloy sintered by high-pressure and high-temperature method

    图  不同烧结条件下得到的纯钨样品SEM图像

    Figure  7.  SEM images of the pure tungsten samples prepared under different sintering conditions

    图  具有不同TiC质量分数的W-TiC合金SEM图像

    Figure  8.  SEM images of W-TiC alloys with different mass fractions of TiC

    图  W-1.5%TiC烧结样品的致密性和硬度随烧结温度的变化

    Figure  9.  Hardness and relative density of the sintered W-1.5%TiC alloy versus sintering temperature

    表  1  氢气还原处理的纯钨烧结样品的性能

    Table  1.   Properties of sintered pure tungsten samples by a hydrogen reduction treatment

    Temperature/(℃) Pressure/(GPa) Time/(min) Relative density/(%) Hv/(GPa)
    1 200 5.0 15 99.1±0.2 5.89
    1 300 5.0 15 99.1±0.2 6.06
    1 300 5.0 30 99.2±0.2 6.19
    1 500 5.0 15 99.3±0.2 6.43
    下载: 导出CSV

    表  2  采用高温高压烧结方法制备的W-1.5%TiC合金性能

    Table  2.   Properties of W-1.5%TiC alloys sintered by high-pressure and high-temperature method

    Temperature/(℃) Pressure/(GPa) Time/(min) Relative density/(%) Hv/(GPa)
    1 200 5.0 15 98.2±0.2 6.55
    1 300 5.0 15 98.5±0.2 7.14
    1 300 5.0 30 98.6±0.2 7.42
    1 500 5.0 15 99.0±0.2 7.58
    下载: 导出CSV
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  • 收稿日期:  2015-01-19
  • 修回日期:  2015-03-27

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