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Abstract
Titanium hydride/potassium perchlorate (THPP) is a pressure producing pyrotechnic composition consisting of a mixture of titanium dihydride and potassium perchlorate with a small percentage of a Viton binder. The initial phase of the study focused upon chemical analysis of THPP downloaded from parts ranging up to 25 years in age. The DSC curves were too erratic for kinetic analysis; however, high resolution TG curves for the THPP samples revealed a significant difference in the temperature at which the aged materials began displaying mass loss. Isothermal DTA and variable heating rate TG kinetic analysis were employed to determine the activation energy of the THPP.
A modification to the derivatograph has been designed that allows thermoanalytical investigations of chemical compounds, including sulphides and acids, that evolve aggressive gases such as CO, SO2, S, etc. during warming. Application of this modification is exemplified by studies on the thermal dehydrogenation of titanium hydride (TiH1.85) and on the interaction of rhenium disulphide (ReS2) with concentrated sulphuric acid.
Introduction At elevated temperatures titanium hydride (TiH 2 ) gradually decomposes via a two-stage endothermic reaction evolving H 2 and yielding pure titanium. As the decomposition proceeds between 673 and 1073 K, i.e., at
. Moreover, the SiC particles strengthen the matrix materials, resulting in a hybrid foam structure. In addition, a Ø3 μm average particle size titanium hydride (TiH 2 ) powder was used as a foaming agent for production. The specimens for the research were
