Abstract
1. A study, involving 5 hours' exposure to temperatures of 500–1200°C, was made of the high-temperature atmospheric oxidation of the disilicides of the Group IV transition metals. The resultant scale was examined by the metallographic and x-ray diffraction techniques. 2. It was established that the oxidation of the disilicides of the Group IV metals is characterized by the formation of multiphase scale consisting of oxides of the relevant metals, their lower silicides, various silica phases, and complex compounds. 3. It is shown that the high protective properties of silica are responsible also for the formation of lower oxides of the metals, SiO, Si2O3, and nitrides of the metals.
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