Quick Search:       Advanced Search
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(英文),2018,47(6):1723~1728.[ZHANG Xinbo,LIU Jinxu,WANG Liu,LI Shukui,ZHANG Song,LAN Jia and 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.]
Effects ofSdifferent Al and W particle size of W-PTFE-Al composites onSthermal characteristics and dynamic response
Download Pdf  View/Add Comment  Download reader
Received:May 28, 2016  Revised:January 20, 2017
DOI:
Key words: composite materials  combustion characteristic  insensitivity  dynamic response
Foundation item:国家自然科学基金项目(面上项目,重点项目,重大项目)
Author NameAffiliation
ZHANG Xinbo,LIU Jinxu,WANG Liu,LI Shukui,ZHANG Song,LAN Jia and WANG Yijin  
Hits: 134
Download times: 
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.