摘要
利用电热爆炸超高速喷涂设备,在镍基高温合金基体上喷涂了含TiB2分别为0、10和20%(质量分数,%)的NiAl复合涂层。分析结果表明涂层均由亚微米晶粒组成,涂层与基体间为冶金结合。加入TiB2显著的提高了NiAl的硬度。在1000℃的等温氧化实验结果表明,NiAl涂层的抗氧化性高于NiAl-TiB2复合涂层。
NiA1-TiB2 composite coatings with 0, 10 and 20% TiB2 were prepared on Ni-based superalloy substrate using electro-thermal explosion ultrahigh speed spraying technology. The results show that the coatings consist of submicron grains. The bond between coatings and substrate is metallurgical binding. TiB2 as effective reinforcement is doped in NiA1, which increases its hardness. The isothermal oxidation tests at 1000 ℃ in air show that the oxidation resistance of NiA1 coating is higher than that of NiAl-TiB2 composite coatings.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2013年第1期139-143,共5页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金(10772066)
教育部重点项目(106053)
