Formation of Oxynitride Layers on Titanium Alloys by Gas Diffusion Treatment

다국어 초록 (Multilingual Abstract)

Titanium alloys were oxynitrided in controlled nitrogen-oxygen gas atmospheres between 650 °C and 950 °C
for 5 h to 10 h with two different techniques of gas diffusion treatment. One technique was performed in
an oxygen-containing (oxygen amount ≥ 0.4 %) nitrogen environment. The other technique was performed
in a deoxygenated (oxygen amount < 0.01 % to 0.0005 %) nitrogen environment with subsequent cooling
in an oxygen-containing nitrogen environment (with an oxygen pressure of 1 Pa). The surface microhardness
of oxynitrided samples increased due to the strengthening effect of titanium oxynitrides (TiNxOy). The maximum
microhardness of the titanium oxynitrides was obtained with a near-equiatomic composition of nitrogen and
oxygen in TiNxOy under optimal oxygen partial pressure and temperature-time conditions.

참고문헌 (Reference)

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