La对原位合成TiC-Al2O3/Al复合材料组织与耐蚀性的影响

材料热处理学报, 2014, 35(11): 6-10.

La对原位合成TiC-Al2O3/Al复合材料组织与耐蚀性的影响

陈素娟 ^1, , 张瑞英 ^2, , 史志铭 ^3, , 李艳辉 ^4, , 韩小伟 ^5,

1.内蒙古工业大学材料科学与工程学院,内蒙古呼和浩特010051

2.内蒙古工业大学材料科学与工程学院,内蒙古呼和浩特010051;内蒙古轻合金重点实验室,内蒙古呼和浩特010051

3.内蒙古工业大学材料科学与工程学院,内蒙古呼和浩特010051;内蒙古轻合金重点实验室,内蒙古呼和浩特010051

4.内蒙古工业大学材料科学与工程学院,内蒙古呼和浩特010051

5.内蒙古工业大学材料科学与工程学院,内蒙古呼和浩特010051

基金项目: 内蒙古高等学校科学研究基金(NJZZ14056) 内蒙古自然科学基金(2013MS0804) 内蒙古工业大学校基金(ZD20120015)

关键词：原位合成 , TiC-Al2O3/Al基复合材料 , La , 显微组织 , 耐蚀性

Effect of La on microstructure and corrosion resistance of in-situ synthesized TiC-Al203/Al composites

Keywords： in-situ synthesis , TiC-Al2O3/Al composite , La , microstructure , corrosion resistance

以TiO2,C和Al粉为原料,利用接触反应法原位合成10％ TiC-Al2O3/Al基复合材料.采用SEM、XRD和电化学测试等研究稀土La对复合材料微观组织和耐蚀性的影响.结果表明,复合材料中La最佳添加量为0.2％,此时复合材料中生成的TiC和Al2O3颗粒数量增多,颗粒分布均匀,棒状Al3Ti被钝化,复合材料组织相对较好,自腐蚀电流密度相对较小,为4.053×10-5A·cm-2,与未添加La复合材料相比降低81％,容抗弧半径相对较大,复合材料耐腐蚀性相对较好.

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