Effects of Al and W Particle Size on Combustion Characteristics and Dynamic Response of W-PTFE-Al Composites. Issue 6 (June 2018)

• Record Type: Journal Article
• Authors: Xinbo, Zhang; Jinxu, Liu; Liu, Wang; Shukui, Li; Song, Zhang; Jia, Lan; Yijin, Wang
• Is Part Of: Xi you jin shu cai liao yu gong cheng. Volume 47:Issue 6(2018)
• Page Start: 1723
• Page End: 1728
• Publication Date: 2018-06
• Subjects: composite materials -- combustion characteristic -- insensitivity -- dynamic response; Nonferrous metals -- Periodicals; 669.05
• DOI: 10.1016/S1875-5372(18)30156-5
• Languages: English
• ISSNs: 1875-5372

Abstract

Abstract: The variation of metallic particle size alters the combustion characteristics and dynamic response of W-PTFE-Al composites. Combustion test results show that with Al particle size decreasing from 10 μm to 1 μm, W particle size increasing from 0.1 μm to 7 μm, the reaction energy of W(7 μm)-PTFE(40 μm)-Al(1 μm) reaches 4570.2 J/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 500 μs. With the decrease of Al particle size, the insensitivity of W-PTFE-Al composites to impact shows a decreasing tendency since the absorbed critical energy before reaction decreases by 14.0%. With the decrease of 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 10 μm to 1 μm, but decreases by 10.2% with W particle size changing from 7 μm to 100 nm.