TY - JOUR
T1 - SiC wear resistance coating with added Ni, for carbon/carbon composites
AU - Zishan, Chen
AU - Hejun, Li
AU - Qiangang, Fu
PY - 2012/12
Y1 - 2012/12
N2 - To improve the tribological performance of carbon/carbon (C/C) composites at high temperature, a SiC coating with added Ni (SiC-Ni coating) was prepared by pack cementation. Dry sliding tests were conducted at different temperatures, and related microstructure and mechanical characteristics were investigated by scanning electron microscopy, X-ray diffraction, nano-indention, and scratch tester. The SiC-Ni coating is mainly composed of SiC and NiSi2, and the adhesion between coating and substrate is reliable. The friction coefficient of SiC-Ni coating is about 0.35 at 25°C, and the predominant wear mechanisms are micro-cutting and plastic deforming. Severe adhesion wear occurs at 600°C which results in high friction coefficient. However, the SiC-Ni coating exhibits self-lubricating properties at 800°C. A dense film (consisting of silica and nickel oxide) spreads on the wear track of SiC-Ni coating at 800°C. This film reduces the friction coefficient effectively and enhances the wear resistance of the coating.
AB - To improve the tribological performance of carbon/carbon (C/C) composites at high temperature, a SiC coating with added Ni (SiC-Ni coating) was prepared by pack cementation. Dry sliding tests were conducted at different temperatures, and related microstructure and mechanical characteristics were investigated by scanning electron microscopy, X-ray diffraction, nano-indention, and scratch tester. The SiC-Ni coating is mainly composed of SiC and NiSi2, and the adhesion between coating and substrate is reliable. The friction coefficient of SiC-Ni coating is about 0.35 at 25°C, and the predominant wear mechanisms are micro-cutting and plastic deforming. Severe adhesion wear occurs at 600°C which results in high friction coefficient. However, the SiC-Ni coating exhibits self-lubricating properties at 800°C. A dense film (consisting of silica and nickel oxide) spreads on the wear track of SiC-Ni coating at 800°C. This film reduces the friction coefficient effectively and enhances the wear resistance of the coating.
KW - Carbon/carbon composites
KW - Coating
KW - High temperature
KW - SiC
KW - Wear
UR - http://www.scopus.com/inward/record.url?scp=84870253517&partnerID=8YFLogxK
U2 - 10.1016/j.surfcoat.2012.10.049
DO - 10.1016/j.surfcoat.2012.10.049
M3 - 文章
AN - SCOPUS:84870253517
SN - 0257-8972
VL - 213
SP - 207
EP - 215
JO - Surface and Coatings Technology
JF - Surface and Coatings Technology
ER -