Abstract
The combustion process in the Ni + Zr + Polytetrafluoroethylene (PTFE) system is investigated. Effect of PTFE addition on the process parameters and characteristics of products are studied. The reacting mixtures and product obtained are studied by differential thermal analysis (DTA) and thermogravimetric (TG) techniques, mass-spectroscopy, ion-chromatography, and XRD analysis. Results are discussed in terms of literature data. The mechanism of combustion process is proposed according to which at initial stages monomer formed at PTFE decomposition reacts with metals to form ZrC, ZrF2, and NiF2. At elevated temperatures, ZrF2 disproportionate to form gaseous ZrF4. Heat generated at early stages of the process stimulates the formation of Ni–Zr intermetallic phases.
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