TY - JOUR
T1 - Microstructural characterization and mechanical property of iridium coating produced by double glow plasma
AU - Wu, Wangping
AU - Lin, Xin
AU - Chen, Zhaofeng
AU - Chen, Zhou
AU - Cong, Xiangna
AU - Xu, Tengzhou
AU - Qiu, Jinlian
PY - 2011/6
Y1 - 2011/6
N2 - Ir is the most interesting as an effective oxygen diffusion barrier for super high-temperature structural materials. In this study, an Ir coating, approximately 7 μm thick, was deposited onto Mo substrate by double glow plasma at substrate temperature of about 1,120 K in an argon atmosphere. The crystal orientation, morphology and mechanical property of the Ir coating were investigated by XRD, SEM, AFM, TEM, nanoindentation and scratch test. The results indicated that the (220)-oriented Ir coating was composed of the columnar grains. The surface roughness of the Ir coating was higher than that of the substrate. The hardness and the elastic modulus of the Ir coating were about 9.5 and 340 GPa, respectively. The coating had a high hardness due to the sub-micrometer size grains. The coating had good scratch resistance due to the strong adhesion of the coating to the substrate.
AB - Ir is the most interesting as an effective oxygen diffusion barrier for super high-temperature structural materials. In this study, an Ir coating, approximately 7 μm thick, was deposited onto Mo substrate by double glow plasma at substrate temperature of about 1,120 K in an argon atmosphere. The crystal orientation, morphology and mechanical property of the Ir coating were investigated by XRD, SEM, AFM, TEM, nanoindentation and scratch test. The results indicated that the (220)-oriented Ir coating was composed of the columnar grains. The surface roughness of the Ir coating was higher than that of the substrate. The hardness and the elastic modulus of the Ir coating were about 9.5 and 340 GPa, respectively. The coating had a high hardness due to the sub-micrometer size grains. The coating had good scratch resistance due to the strong adhesion of the coating to the substrate.
KW - Coating
KW - Hardness
KW - Morphology
KW - Plasma discharge
UR - http://www.scopus.com/inward/record.url?scp=79955914435&partnerID=8YFLogxK
U2 - 10.1007/s11090-011-9293-4
DO - 10.1007/s11090-011-9293-4
M3 - 文章
AN - SCOPUS:79955914435
SN - 0272-4324
VL - 31
SP - 465
EP - 475
JO - Plasma Chemistry and Plasma Processing
JF - Plasma Chemistry and Plasma Processing
IS - 3
ER -