Microstructure and Tribological Properties of Spark-Plasma-Sintered Ti3SiC2-Pb-Ag Composites at Elevated Temperatures

Abstract

Ti3SiC2-PbO-Ag composites (TSC-PA) were successfully prepared using the spark plasma sintering (SPS) technique. The ingredient and morphology of the as-synthesized composites were elaborately investigated. The tribological properties of the TSC-PA pin sliding against Inconel 718 alloys disk at room temperature (RT) to 800 °C were examined in air. The wear mechanisms were argued elaborately. The results showed that the TSC-PA was mainly composed of Ti3SiC2, Pb, and Ag. The average friction coefficient of TSC-PA gradually decreased from 0.72 (RT) to 0.3 (800 °C), with the temperature increasing from RT to 800 °C. The wear rate of TSC-PA showed a decreasing trend, with the temperature rising from RT to 800 °C. The wear rate of Inconel 718 exhibited positive wear at RT and negative wear at elevated temperatures. The tribological property of TSC-PA was related to the tribo-chemistry, and the abrasive and adhesive wear.

Tribological Properties of Cu-MoS2-WS2-Ag-CNT Sintered Composite Materials

“…Currently, an intense search for self-lubricating materials and surface layers that contain solid lubricants embedded in their matrix is underway [ 11 , 12 , 13 , 14 , 15 ]. They can be produced using: powder metallurgy (resulting in the formation of self-lubricating materials), laser alloying (resulting in the formation of technological superficial layers) or thermal spraying as well as PVD and CVD techniques (resulting in the formation of coatings) [ 11 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 ]. The disadvantages of self-lubricating coatings are limited service life, difficulties in refilling, oxidation, aging-related degradation and poor adhesion.…”

Microstructural Design and Processing Control of Advanced Ceramics

“…The authors of [22] reported the microstructure and mechanical properties of composites obtained by spark plasma sintering of Ti 3 SiC 2 -15 vol.%Cu mixtures, and the microstructure and tribological properties of spark-plasma sintered Ti 3 SiC 2 -Pb-Ag composites at elevated temperatures were further investigated in [23]. The authors of [24] explored the effect of Al 2 TiO 5 content and sintering temperature on the microstructure and residual stress of Al 2 O 3 -Al 2 TiO 5 ceramic composites, and the effects of material design and sintering process on residual stresses were expounded from macro-and micro-levels.…”