Work

Increased exothermic reactivity of polytetrafluoroethylene-coated aluminum powders: Impact of powder size reduction

Year: 2023

Type: article

Abstract: Polytetrafluoroethylene (PTFE)-coated aluminum (PTFE/Al) powder was synthesized to evaluate its exothermic reactivity with the reduction in Al powder size. The exothermic enthalpy energies of uncoated Al powders clearly increase as the particle size decreases from 30 to 5 μm. Thus, the PTFE/Al (5 μm) powder exhibited the highest exothermic enthalpy energy of 4300 J/g, which is approximately two times higher than that of uncoated Al (5 μm) and PTFE/Al (30 μm) powders. The findings clarify that the combination of powder size reduction and PTFE coating results in both a considerable enhancement of exothermic reactivity and tailorable enthalpy energy values.

Source: Materials Letters

DOI: 10.1016/j.matlet.2023.135009

Authors: Soo-ho Jung, Kyung Tae Kim, Jinhee Bae, Yoon Jeong Choi, Jae Min Kim, Jeong-Yun Sun

Institutions: Seoul National University, Korea Institute of Materials Science, Agency for Defense Development

Language: English

Topic: Energetic Materials and Combustion

Subfield: Mechanics of Materials

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $2,220

Funders: Agency for Defense Development, Korea Institute of Materials Science