Mechanical properties, impact initiation characteristics and energy release effect of Al/PTFE reactive materials enhanced by Fe particles

XU, Xiang-chun; ZHANG, Qing-chun; FANG, Hong-jie; Guo, Bin; Liang, Wen; JIN, Bo; PENG, Ru-fang; YU, Kun; Chen, Rong

doi:10.1016/s1003-6326(22)66138-7

Cited by 10 publications

(1 citation statement)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With increasing strain rate for a given composite, the yield and compressive strength increase, but the failure strain decreases monotonically. The failure strain in the dynamic compression tests shows a different trend from that in the quasistatic compression tests, and the reason for this difference may be that the impact reaction happens simultaneously or just prior to the failure of the samples 19 . At a strain rate of 5000 s −1 , the dynamic compressive strength of both the Al/PTFE/W and Al/PTFE/CuO polymer composites reaches its peak of 194.1 and 189.2 MPa, respectively, at an additives content of 30%; these values are 40.3% and 36.8% higher, respectively, than that of Al/PTFE (138.3 MPa).…”

Section: Resultsmentioning

confidence: 90%

Effects of different mass ratios on mechanical properties and impact energy release characteristics of Al/PTFE/W and Al/PTFE/CuO polymer composites

Xu,

Fang,

Chen

et al. 2024

Polymer Composites

Self Cite

View full text Add to dashboard Cite

Aluminum/polytetrafluoroethylene (Al/PTFE) is an impact‐initiated material that is extensively utilized in military and civilian applications due to its insensitivity, high energy density and ease of manufacturing. To increase both its compressive strength and energy density, Al/PTFE was doped with various amounts of W and CuO particles. These polymer composites exhibit elastoplastic properties, as well as significant strain hardening and strain‐rate hardening during compression deformation. At a strain rate of 5000 s−1, the compressive strength of the Al/PTFE/W and Al/PTFE/CuO specimens with an additive content of 30% reaches a peak of 194.1 and 189.2 MPa, which corresponds to an increase of 40.3% and 36.8%, respectively, compared with the compressive strength of Al/PTFE (138.3 MPa). The homogeneous bonding strength between the additives and PTFE and the fact that the elastic PTFE nanofibers inhibit the extension of microcracks are the main mechanical strengthening mechanisms. The reaction of the composites under high‐speed impact is violent and accompanied by sputtering sparks, and the reaction efficiency was determined using an improved drop‐hammer apparatus. As the W content increases, the impact reactivity of Al/PTFE/W decreases monotonically. However, as CuO content increases, the reaction intensity of Al/PTFE/CuO initially increases, and then decreases. At a CuO content of 30%, the energy release efficiency of Al/PTFE/CuO reaches its maximum (10.49%), which is 84.4% higher than that of Al/PTFE. TG‐DSC and XRD tests were performed to analyze the pyrolysis process and elucidate the reaction mechanism. A gas–solid chemical reaction model was developed, and the reactivity arises from multiple factors.Highlights Typical elastoplastic characteristics as well as strain hardening and strain‐rate hardening were observed. The mechanical strengthening effect of W particles is higher than that of CuO particles of Al/PTFE specimen. The addition of W particles decreases the impact reactivity, but the addition of CuO particles improves the energy density of Al/PTFE. The reaction efficiency of Al/PTFE/CuO reaches a peak of 10.49%, which increased by 84.4% compared with that of Al/PTFE.

show abstract

Section: Resultsmentioning

confidence: 90%

Effects of different mass ratios on mechanical properties and impact energy release characteristics of Al/PTFE/W and Al/PTFE/CuO polymer composites

Xu,

Fang,

Chen

et al. 2024

Polymer Composites

Self Cite

View full text Add to dashboard Cite

show abstract

Dynamic Constitutive Model of Tungsten‐Whisker‐Reinforced Aluminum/Polytetrafluoroethylene Composite Material and Quantitative Determination of Impact Reaction Release Energy in Vacuum Environment

Tang,

Deng,

Wang

et al. 2024

Adv Eng Mater

View full text Add to dashboard Cite

To meet the strength requirements of aluminum/polytetrafluoroethylene (Al/PTFE) in practical applications, tungsten (W) whisker is added into the traditional formula Al/PTFE (26.5%/73.5%) to improve the dynamic compressive strength of the reactive material. Mechanical properties of reactive material specimens prepared by sintering are tested. In the results, it is shown that the dynamic compressive strength of Al/PTFE‐reactive material reinforced by tungsten whisker with volume fraction of 13.1% can reach 141 MPa at strain rate of 1800 s−1. The constitutive model of dynamic compression for tungsten‐whisker‐enhanced Al/PTFE‐reactive material is constructed, and the results are basically consistent with the experimental results. The quantitative impact energy release of reactive material specimens under vacuum environment are performed by using the two‐stage light gas gun loading system, and the quantitative impact release energies of Al/PTFE‐reactive material reinforced by tungsten whisker under different whisker percentage content and diameter are obtained.

show abstract

Effects of three types of additives on mechanical properties and impact energy release characteristics of Al/PTFE reactive structural material

Xu,

Fang,

Chen

et al. 2024

J. Cent. South Univ.

View full text Add to dashboard Cite

Mechanical properties, impact initiation characteristics and energy release effect of Al/PTFE reactive materials enhanced by Fe particles

Cited by 10 publications

References 38 publications

Effects of different mass ratios on mechanical properties and impact energy release characteristics of Al/PTFE/W and Al/PTFE/CuO polymer composites

Effects of different mass ratios on mechanical properties and impact energy release characteristics of Al/PTFE/W and Al/PTFE/CuO polymer composites

Dynamic Constitutive Model of Tungsten‐Whisker‐Reinforced Aluminum/Polytetrafluoroethylene Composite Material and Quantitative Determination of Impact Reaction Release Energy in Vacuum Environment

Effects of three types of additives on mechanical properties and impact energy release characteristics of Al/PTFE reactive structural material

Contact Info

Product

Resources

About