科研之友
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摘要
Phase transformations, volume changes, and hydrogen release kinetics under dehydrogenation of compacted titanium-hydride powder are studied. Dehydrogenation intensity and its stages depend on diffusion mobility of hydrogen through various Ti-H phases. Reduction of surface oxide films by hydrogen and increased amount of crystal defects due to phase transformations result in both the accelerated formation of diffusion contacts between the powder particles and the sintering activation. Mutual influence of such processes as grain growth and pore-ensemble evolution is an obstacle to achieve fully dense material. Possible ways to reach fully dense state are analysed.
- 出版日期2011-7
