摘要
将原料粉体按TiC:Ti:Al:C=0.5:1.5:1:0.5的配比充分混合,在石墨模具中加压到30MPa,升温至1400℃保温2h后自然冷却到室温,得到高纯致密的Ti2AlC烧结体。用电化学方法测定了高纯Ti2AlC在不同腐蚀介质中的极化曲线。结果表明,Ti2AlC在HCl中的腐蚀电流密度最大,腐蚀严重;而在NaOH中自腐蚀电压最负,腐蚀趋势最大;除了在HCl中表现为活性溶解外,在其它的腐蚀介质中均出现钝化现象。
The preparing process for high purity Ti2AlC is as follows： blending original powder in proportion as TiC ：Ti ：Al ：C=0.5： 1.5：1：0.5, putting it into the graphite mould, then it is compacted at 30 MPa pressure and sintered at temperature of 1 400 ℃. The polarization curve of high-pure Ti2AlC in different medium was determined by electrochemical method. The result showed that the corrosion current in HCl is highest, which is deep corrosion. The corrosion voltage in NaOH is lowest and the trend of corrosion is easiest. Ti2AlC showed passivity in all Of corrosion medium but in HCl.
出处
《稀有金属快报》
CSCD
2008年第5期34-37,共4页
Rare Metals Letters
