بررسی اثر تنگستن بر روی  خواص مکانیکی و حرارتی  کامپوزیتی واکنشی PTFE-Al

jodaki, javad; irankhah, abdolah

Volume 18, Issue 3 (11-2023) مواد پرانرژی 2023, 18(3): 143-152 | Back to browse issues page

‎ 20.1001.1.17353629.1402.18.3.4.0

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jodaki J, irankhah A. بررسی اثر تنگستن بر روی خواص مکانیکی و حرارتی کامپوزیتی واکنشی PTFE-Al. مواد پرانرژی 2023; 18 (3) :143-152
URL: http://isaem.ir/article-1-1489-en.html

بررسی اثر تنگستن بر روی خواص مکانیکی و حرارتی کامپوزیتی واکنشی PTFE-Al

Javad Jodaki

, Abdolah Irankhah ^*

, irankhah@kashanu.ac.ir

Abstract: (397 Views)

Reactive composites are a new category of composite materials composed of two or more metallic substances, polymer-metal and thermite materials. These composites are not flammable or explosive under ambient conditions but have the capability to release a significant amount of energy during severe shock and impact loads. The objective of this article is to investigate the impact of varying the percentage of tungsten (W) particles on, Thermal and mechanical properties of Al-PTFE composite. To achieve this, Al-PTFE compositions with different weight ratios and ethanol were milled and blended for an hour. Then mixed powders were dried at 60°C for 48 hours under vacuum condition. After drying, They were pressed at pressure of 200 MPa for 20 seconds. Sintering was carried out at 380°C with heating rate of 1°C/min under vacuum condition for 4 hours and species were kept under vacuum conditions until they were cooled. The microstructure was analyzed using Field Emission Scanning Electron Microscopy (FESEM). Combustion properties were assessed using Differential Scanning Calorimetry (DSC) and combustion tests. Mechanical properties were evaluated through compression and Hopkinson tests. In the combustion test, the highest released heat was associated with 20Al-50PTFE-30W reactive sample. In the compression and Hopkinson tests, the highest compressive strength was observed for the 20Al-10PTFE-70W sample, reaching 30.1 MPa and 62.1 MPa, respectively. the results indicated that with an increase in the strain rate in the compression test, from 0.01 s^-1 (compression test) to 1000 s^-1 (Hopkinson test), the compressive strength increased. Additionally, the addition of tungsten (W) to the Al-PTFE composite improved the mechanical properties.

Keywords: Reactive composites, High-energetic materials, Powder metallurgy, Combustion test, Hopkinson test.

Full-Text [PDF 1473 kb] (30 Downloads)

Type of Study: Research | Subject: کامپوزیتها و نانو کامپوزیتها
Published: 2024/05/22