High temperature oxidation behaviors of Ti-Cr alloys with Laves phase TiCr2
来源期刊：中国有色金属学报(英文版)2002年第2期
论文作者：肖平安 曲选辉 雷长明 祝宝军 秦明礼 敖晖 黄培云
文章页码：200 - 203
Key words：Laves phase; TiCr2；Ti-Cr alloy；oxidation
Abstract: The high temperature oxidation behaviors of Ti-Cr alloys containing 18%～35%Cr with Laves phase TiCr2 were investigated at 650～780℃ for exposure up to 104h. The results reveal that chromium content has critical significance to the oxidation resistance of the alloys. The scaling rates of the alloys with less than 21%Cr are higher than those measured for pure titanium, but for the alloys with more than 26%Cr their scaling rate is lowered by 1～2 times, under the same oxidizing conditions. Both an external and an internal oxidation layers were observed. The oxidation resistance enhancement by chromium alloying is contributed to the formation of a continuous and compact chromic oxide interleaf in the scale. Oxidation temperature significantly affects the scaling rates of Ti-Cr alloys, and the mass gain is doubled with a temperature change from 650℃ to 700℃ or from 700℃ to 780℃, for the same exposure duration. TiCr2 shows no negative influence on the high temperature oxidation resistance of the alloys.
