MoB/CoCr Coating by Low Pressure Plasma Spraying against Erosion by Molten Al-12.07wt.%Si Alloy
MoB/CoCr, a novel material for thermal spraying, with high durability is used to resist erosion by molten Al-12.07wt.%Si alloy. The durability of the MoB/CoCr coating prepared by low pressure plasma spraying (LPPS) has been investigated using a molten-metal immersion tester. The test revealed that the MoB/CoCr coating has much higher durability without dissolution in the molten Al-12.07wt.%Si alloy. Little change of crystal structure, mainly composed of ternary borides of Co2MoB2 and CoMoB, is observed after the immersion test, suggesting that the ternary borides have much higher durability.
Xiaoming Sang, Pengcheng Wang, Liqun Ai, Yungang Li and Jinglong Bu
X. Chen "MoB/CoCr Coating by Low Pressure Plasma Spraying against Erosion by Molten Al-12.07wt.%Si Alloy", Advanced Materials Research, Vols. 284-286, pp. 676-679, 2011