摘要
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A13Ti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。
TiC and Al2O3 particles reinforced aluminum matrix composite was synthesized from TiO2,C and Al powder by the in-situ contact reaction method.The effects of La on the microstructure and corrosion resistance of 10% TiC-Al2O3/Al composite were investigated by SEM,XRD and electrochemical test.The results show that the optimal La content in composite is 0.2%,the amount of TiC and Al2O3 particles increases and the distribution of the particles becomes uniform.The rodlike A13 Ti phase of the composites is transformed to massive Ti2Al20 La phase.The microstructure of the composites with addition of 0.2% La is relatively well.The corrosion current density of the composites is relatively lower,which is 4.053 × 10-5A·cm-2,reducing by 81% compared with that of the composites not added La,capacitive reactance arc radius is relatively large,the corrosion resistance is relatively well.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2014年第11期6-10,共5页
Transactions of Materials and Heat Treatment
基金
内蒙古自然科学基金(2013MS0804)
内蒙古高等学校科学研究基金(NJZZ14056)
内蒙古工业大学校基金(ZD20120015)
