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不同铝颗粒和钨颗粒粒径对W-PTFE-Al复合材料热学特性和动态响应的影响研究
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北京理工大学材料学院,北京理工大学材料学院,北京理工大学材料学院,北京理工大学材料学院,北京理工大学材料学院,北京理工大学材料学院,北京理工大学材料学院

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O389

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国家自然科学基金项目(面上项目,重点项目,重大项目)


Effects ofSdifferent Al and W particle size of W-PTFE-Al composites onSthermal characteristics and dynamic response
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School of Material Science and Engineering,Beijing Institute of Technology BIT,No Zhongguancun South Street,Beijing,School of Material Science and Engineering,Beijing Institute of Technology BIT,No Zhongguancun South Street,Beijing,School of Material Science and Engineering,Beijing Institute of Technology BIT,No Zhongguancun South Street,Beijing,School of Material Science and Engineering,Beijing Institute of Technology BIT,No Zhongguancun South Street,Beijing,School of Material Science and Engineering,Beijing Institute of Technology BIT,No Zhongguancun South Street,Beijing,School of Material Science and Engineering,Beijing Institute of Technology BIT,No Zhongguancun South Street,Beijing,School of Material Science and Engineering,Beijing Institute of Technology BIT,No Zhongguancun South Street,Beijing

Fund Project:

The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    摘要:

    通过调控金属颗粒的粒径可以显著改变W-PTFE-Al复合材料的热学特性和动态力学响应。燃烧性能测试结果表明W(7μm)-PTFE(40μm)-Al(1μm)复合材料在氩气气氛下的能量为4570.2J/g, 在氧气气氛下能量为9848.1J/g。这表明减小铝粉粒径和增大钨颗粒粒径有助于W-PTFE-Al材料能量值的提高。在冲击条件下, 四种W-PTFE-Al复合材料燃烧时间均超过500μs。随着铝粉粒径的减少,反应临界吸收功降低14%,“钝感”特性呈现下降趋势。随着钨粉粒径的减少,反应临界吸收功升高34.8%,“钝感”特性呈现上升趋势。动态压缩试验结果表明随着铝粉粒径从10μm降至1μm, W-PTFE-Al材料的抗压强度提高8.0%; 随着钨粉粒径从7μm降至100nm, W-PTFE-Al材料的抗压强度降低10.2%。

    Abstract:

    This report shows that the variation of metallic particle size alters the combustion characteristics and dynamic response of W-PTFE-Al composites. Combustion test results show that the reaction energy of W(7μm)-PTFE(40μm)-Al(1μm) reached 4570.2J/g in argon environment and 9848.1J/g in oxygen environment, indicating fine aluminum and coarse tungsten contribute to the increase of reaction energy. Under dynamic loading, the deflagration time of all four kinds of W-PTFE-Al composites is longer than 500μs. With decreased Al particle size, the insensitivity of W-PTFE-Al composites to impact shows a decreasing tendency due to the absorbed critical energy before reaction decreases by 14.0%. With decreased W particles size, the insensitivity of W-PTFE-Al composites to impact enhances due to the absorbed critical energy before reaction increases by 34.8%. The dynamic compression results show that, the ultimate strength of W-PTFE-Al composites increases by 8.0% with Al particle size changing from 10μm to 1μm, but decreases by 10.2% with W particle size changing from 7μm to 100nm.

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张新博,刘金旭,王柳,李树奎,张松,兰佳,王乙瑾.不同铝颗粒和钨颗粒粒径对W-PTFE-Al复合材料热学特性和动态响应的影响研究[J].稀有金属材料与工程,2018,47(6):1723~1728.[ZHANG Xinbo, LIU Jinxu, WANG Liu, LI Shukui, ZHANG Song, LAN Jia, WANG Yijin. Effects ofSdifferent Al and W particle size of W-PTFE-Al composites onSthermal characteristics and dynamic response[J]. Rare Metal Materials and Engineering,2018,47(6):1723~1728.]
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  • 收稿日期:2016-05-28
  • 最后修改日期:2017-01-20
  • 录用日期:2017-02-21
  • 在线发布日期: 2018-09-06
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