Frictional Layer and Its Antifriction Effect in High-Purity Ti3SiC2 and TiC-Contained Ti3SiC2

Hong Xiang Zhai; Zhen Ying Huang; Yang Zhou; Zhi Li Zhang; Yi Fan Wang

doi:10.4028/www.scientific.net/KEM.280-283.1347

Paper Titles

Erosion Wear Characteristics of Si₃N₄ Fabricated from Low-Cost Powders
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Oxidation Behaviors of MgAlON/Si₃N₄ Composite at High Temperature
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Synthesis of Ti₃SiC₂ Bulk Materials with B₂O₃ Additive
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A Soft Ceramic Ti₃SiC₂ with Microscale Plasticity at Room Temperature
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Frictional Layer and Its Antifriction Effect in High-Purity Ti₃SiC₂ and TiC-Contained Ti₃SiC₂
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Sliding Friction Behavior of Bulk Ti₃SiC₂ under Difference Normal Pressures
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Tribo-Chemical Reaction in Bulk Ti₃SiC₂ under Sliding Friction
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Fabrication and Mechanical Properties of HAp/Ti₃SiC₂ (60 vol.%) Composite by Sparkle Plasma Sintering
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Fabrication and Properties of Ti₃AlC₂-Based Ceramics by Two-Step Method
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Frictional Layer and Its Antifriction Effect in High-Purity Ti₃SiC₂ and TiC-Contained Ti₃SiC₂

Abstract:

Characteristics of the frictional layer in high-purity Ti3SiC2 and TiC-contained Ti3SiC2, sliding against low carbon steel, were investigated. The friction and wear tests were made using a block-on-disk type friction tester with sliding speed of 20 m/s and several normal pressures from 0.1 MPa to 0.8 MPa. It was found that all friction surfaces, whether high-purity Ti3SiC2 or TiC-contained Ti3SiC2, were covered by a layer consisting of the oxides of Ti, Si and Fe. The layer was sticky, superimposed layer-by-layer, and the compact was increased with the normal pressure increasing. Because its antifriction effect, the friction coefficient decreases from the maximum 0.35 to 0.27 with increase in the normal pressure from 0.2 MPa to 0.8 MPa for the high-purity Ti3SiC2, and decreases from the maximum 0.55 to 0.37 for the same change of the normal pressure for the TiC-contained Ti3SiC2. The contained TiC grains had effects on the stickiness, liquidness, as well as the morphology of the layer, and induced the friction coefficient to increase in the entire level.