莫来石基耐火材料夹杂物与粉末冶金高温合金FGH96界面反应

张轶波 郑亮 许文勇 李周 张国庆

张轶波, 郑亮, 许文勇, 李周, 张国庆. 莫来石基耐火材料夹杂物与粉末冶金高温合金FGH96界面反应[J]. 航空材料学报, 2022, 42(2): 20-28. doi: 10.11868/j.issn.1005-5053.2021.000159
引用本文: 张轶波, 郑亮, 许文勇, 李周, 张国庆. 莫来石基耐火材料夹杂物与粉末冶金高温合金FGH96界面反应[J]. 航空材料学报, 2022, 42(2): 20-28. doi: 10.11868/j.issn.1005-5053.2021.000159
ZHANG Yibo, ZHENG Liang, XU Wenyong, LI Zhou, ZHANG Guoqing. Interfacial reaction between mullite-based inclusions and PM superalloy FGH96[J]. Journal of Aeronautical Materials, 2022, 42(2): 20-28. doi: 10.11868/j.issn.1005-5053.2021.000159
Citation: ZHANG Yibo, ZHENG Liang, XU Wenyong, LI Zhou, ZHANG Guoqing. Interfacial reaction between mullite-based inclusions and PM superalloy FGH96[J]. Journal of Aeronautical Materials, 2022, 42(2): 20-28. doi: 10.11868/j.issn.1005-5053.2021.000159

莫来石基耐火材料夹杂物与粉末冶金高温合金FGH96界面反应

doi: 10.11868/j.issn.1005-5053.2021.000159
基金项目: 国家重点研发计划(2019YFA0705300);国家自然科学基金(52071310、91860131);国家科技重大专项(Y2019-VII-0011-0151)
详细信息
    通讯作者:

    张国庆(1962—),男,博士,研究员,研究方向为高温合金、金属间化合物、特殊钢、粉体材料等高性能金属结构材料及其先进制备加工技术,联系地址:北京市海淀区环山村航材大道8号(100095),E-mail: g.zhang@126.com

  • 中图分类号: TG132.3+2

Interfacial reaction between mullite-based inclusions and PM superalloy FGH96

  • 摘要: 采用光学金相显微镜(OM)、扫描电镜(SEM)及电解腐蚀方法研究粉末冶金高温合金FGH96中人工植入莫来石基耐火材料夹杂物在原始颗粒态、热等静压和热变形过程中形貌和成分的演变规律,揭示莫来石基夹杂物与合金基体发生界面反应的机制。结果表明:在原始颗粒态时,人工植入的莫来石基夹杂物为无规则颗粒状;经过高温高压的热等静压固结成形后,夹杂物内部形态和成分未发生明显变化,但夹杂物与基体界面发生置换反应形成了结构复杂的反应层,该反应层由Al、Ti的氧化物构成,并含有较多孔隙。经过25%变形量(温度1080 ℃、应变速率0.0004 s−1)的热变形后,夹杂物主体形态和成分未发生明显变化,而夹杂物外部包覆的反应层随高温合金基体的变形开始从夹杂物上剥离和拉长,并随着金属基体的流动变形,在靠近拉长方向一侧发生聚集;当变形程度为50%时,莫来石夹杂物连同外部包覆的反应层发生破碎变形,形成夹杂物碎块加反应层的复合形态,该复合形态夹杂物呈线状分布,长轴垂直于压缩方向;当夹杂物外部包覆的反应层被剥离、莫来石夹杂物本体破碎后,形成的暴露于高温合金基体的新表面将继续反应生成新反应层,破碎的莫来石夹杂物本体仍然以O、Al、Si为主要组成,但同时含有少量Ni、Cr、Ti、Co、Mo等高温合金中的元素。

     

  • 图  1  莫来石基耐火材料颗粒 SEM 形貌及 EDS分析 结果 (a)SEM 形貌 ;(b)区域 1 处 EDS 分析结果

    Figure  1.  SEM morphology and EDS results of mullite based refractory particles  (a)SEM morphology ;(b)EDS results for area 1

    图  2  莫来石基耐火材料颗粒XRD结果

    Figure  2.  XRD results of mullite based refractory particles

    图  3  Al2O3-SiO2系相图莫来石相区[26]

    Figure  3.  Mullite phase region of SiO2 and Al2O3 system phase diagram [26]

    图  4  HIP态经电解腐蚀暴露后人工添加的莫来石夹杂物光学显微图像

    Figure  4.  Optical microscope images of mullite inclusions with HIP state after electrolytic corrosion

    图  5  HIP 态夹杂物的 SEM 二次电子像和反应层局部各元素的 EDS 面扫描结果 (a)夹杂物二次电子像; (b)反应层局部二次 电子像;(c)反应层局部背散射像;(d)夹杂物 EDS 结果

    Figure  5.  SEM image of inclusions with HIP state and EDS surface scanning results in the reaction layer  (a)secondary electron image of inclusions; (b)secondary electron image of reaction layer ;(c)backscattering image of reaction layer; (d)EDS results of the inclusions

    图  6  HIP 态夹杂物反应层局部各元素的 EDS 点采样结果及线扫描位置示意

    Figure  6.  EDS result with HIP state inclusion and schematic diagram of line scanning position in the reaction layer

    图  7  HIP 态夹杂物反应层局部各元素的 EDS 线扫描结果

    Figure  7.  EDS line scanning results in the reaction layer of inclusions with HIP state

    图  8  25%热模拟变形后莫来石基耐火材料夹杂物 SEM 微观形貌二次电子像及相应 EDS 结果

    Figure  8.  Morphology secondary electron image and EDS results of inclusions in mullite based refractories after 25% thermal deformation

    图  9  50%热模拟变形后莫来石基耐火材料夹杂物 SEM 微观形貌及相应 EDS 结果

    Figure  9.  Morphology secondary electron image and EDS results of inclusions in mullite based refractories after 50% thermal deformation

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出版历程
  • 收稿日期:  2021-09-22
  • 录用日期:  2022-02-15
  • 修回日期:  2022-03-26
  • 网络出版日期:  2022-04-22
  • 刊出日期:  2022-04-01

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