Peculiarities of the behavior of the W–Al{sub 2}O{sub 3} system in a controlled reducing atmosphere
Journal Article
·
· Crystallography Reports
The W–Al{sub 2}O{sub 3} system at T = 2400 K and standard pressure (controlled Ar + H{sub 2} atmosphere) has been calculated by stochastic simulation. It is shown that the presence of hydrogen leads to the formation of aluminum hydrides, hydrogen oxides, and aluminum hydroxides; the compounds from the two latter groups (except for water) can interact directly with tungsten. The main chemical reactions occurring in the system are determined, based on which a conclusion about the cyclic character of the processes is drawn. Some recommendations on the composition and pressure of controlled atmosphere for growing sapphire crystals are given.
- OSTI ID:
- 22645569
- Journal Information:
- Crystallography Reports, Journal Name: Crystallography Reports Journal Issue: 2 Vol. 61; ISSN 1063-7745; ISSN CYSTE3
- Country of Publication:
- United States
- Language:
- English
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