Saint-Petersburg State Mining University

V. I. Bolobov, Professor, Department of Mining Machines and Machine-Building Technology, e-mail: Boloboff@mail.ru

Experimental results on the conditions of self-ignition of samples of various grades of titanium alloys for their destruction in oxygen mixtures simulating the composition of gas mixtures of autoclaves. Shown that the dilution of oxygen with nitrogen or water vapor leads to a significant increase in the partial pressure of oxygen in the mixture, in which there is spontaneous combustion of alloys. In this case the nature of the used diluent (nitrogen or water vapor), and heating the samples to 473 K on the value of partial pressure of oxygen essentially no effect. Assuming that the molecules of nitrogen and water vapor act as passive agents, which occupy the active sites formed during the destruction of a sample of juvenile metal surface, the results of the experimental data shows the kinetic equation of adsorption of reagents on the juvenile surface of titanium alloys, and determined its constants. A possible explanation for the influence of nitrogen and water vapor at the critical pressure of ignition of materials and output dependence linking the critical ignition temperature fracture of titanium alloys with partial pressures of oxygen and diluent in the mixture.

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