To improve the tribological characteristics of dimples on the surface of 45 steel,the dimples were filled with MoS_(2)and MoS_(2)modified by dopamine(MoS_(2)@DA),and ball-disk friction and wear tests were conducted.Sp...To improve the tribological characteristics of dimples on the surface of 45 steel,the dimples were filled with MoS_(2)and MoS_(2)modified by dopamine(MoS_(2)@DA),and ball-disk friction and wear tests were conducted.Specifically,the dimple filling gap,abrasion depth,and surface cross-sectional area of 45 steel were measured.The wear morphology of the friction ball and exfoliation of MoS_(2)in the dimples and the bending characteristics of the specimens were studied.The surface friction coefficient of MoS_(2)@DA-filled specimen was 17.9%lower than MoS_(2)-filled specimen,and the dimple filling gap was 70.1%lower,the surface abrasion depth was 5.8%lower,and the abrasion cross-sectional area was 17.7%smaller.Moreover,the bending strength of the MoS_(2)@DA specimen was 3.27 times greater than that of the MoS_(2)specimen,and the exfoliation of MoS_(2)was slowed by filling with the MoS_(2)@DA.Finally,the tribological characteristics were also superior for the specimens prepared with MoS_(2)@DA.展开更多
基金National Natural Science Foundation of China,Grant/Award Number:51875294Ningbo Science and Technology Innovation 2025 Major Special Project,Grant/Award Number:2021Z077。
文摘To improve the tribological characteristics of dimples on the surface of 45 steel,the dimples were filled with MoS_(2)and MoS_(2)modified by dopamine(MoS_(2)@DA),and ball-disk friction and wear tests were conducted.Specifically,the dimple filling gap,abrasion depth,and surface cross-sectional area of 45 steel were measured.The wear morphology of the friction ball and exfoliation of MoS_(2)in the dimples and the bending characteristics of the specimens were studied.The surface friction coefficient of MoS_(2)@DA-filled specimen was 17.9%lower than MoS_(2)-filled specimen,and the dimple filling gap was 70.1%lower,the surface abrasion depth was 5.8%lower,and the abrasion cross-sectional area was 17.7%smaller.Moreover,the bending strength of the MoS_(2)@DA specimen was 3.27 times greater than that of the MoS_(2)specimen,and the exfoliation of MoS_(2)was slowed by filling with the MoS_(2)@DA.Finally,the tribological characteristics were also superior for the specimens prepared with MoS_(2)@DA.
