Tribological and mechanical behaviors of engine bearing with CuSn10 layer and h-BN/ graphite coating prepared by spraying under different temperatures. (December 2020) - Cao, Jun
Abstract: To overcome two critical deficiencies i.e. poor self-lubricating and short life of engine bearing, a CuSn10 layer along with newly designed h-BN/graphite coating is deposited on the surface of an engine bearing. The tribological and mechanical properties of the engine bearing are studied. Firstly, the porosities of the CuSn10 layer and h-BN/graphite coating are low due to the powder-filled action and the sealing action of the modified polymer respectively. Secondly, the CoFs of the engine bearing under the coating of h-BN/graphite will fall by 225.00% at room temperature and 857.14% at 200 °C due to the transfer film generated. Lastly, the life of this bearing has increased by 639.03% due to the newly designed layer and coating. Highlights: The CoFs of the bearing are decreased due to the self-lubricating film generated from the newly designed coating. High CoF and heavy load have the serious synergistic damage effect on the life of bearing. The porosity of CuSn10 layer is 0.07% due to the powder-filled and densified action of cold spraying. The life of this bearing is improved by 639.03% due to the newly designed layer and coating.