DEVELOPMENT AND OXIDATION RESISTANCE OF PLASMA SPRAYED Mo(Si,Al)(2) COATING ON Nb-ss/Nb5Si3 IN SITU COMPOSITES

作者：Yao Dendzun^*; Wei Haixia; Zhou Chungen

来源：International Journal of Modern Physics B, 2010, 24(15-16): 3173-3178.

DOI：10.1142/S0217979210066276

• Mo(Si,Al)(2)
• plasma spraying
• coating
• oxidation
• Nbss/Nb5Si3 in situ composites

A Mo(Si,Al)(2) coating is developed to protect Nbss/Nb5Si3 in situ composite by plasma spraying. The binary layers of this coating consist of an inner interdiffusion layer surrounded by Mo(Si, Al)(2) layer with C40 crystal structure. After oxidation at 1250 degrees C for 100h, Mo(Si, Al)(2) coating exhibited an excellent protection against oxidation and good adherence to substrate. The oxidation curve followed parabolic law and even after oxidation at high temperature for 100h, the weight gain per unit area of Mo(Si, Al)(2) coating is 8.24mg/cm(2). No evident spalling of coating to substrate was observed but a continuous and compact layer of Al2O3 was formed on coating surface to prevent oxidation below coating and substrate.

• 出版日期2010-6-30
• 单位北京大学