Preparation of Composites from Al and Ti3AlC2 and its Tribo-Chemistry Reactions against Low Carbon Steel

Zhang, Zhi Li; Zhai, Hong Xiang; Zhou, Yang; Huang, Zhen Ying; Ai, Ming Xing

doi:10.4028/www.scientific.net/KEM.368-372.989

Paper Titles

Microstructure and Phase Composition of AlN/Al Composite Fabricated by Directed Melt Nitridation
p.977

Ablation Performance and Surface Texture of the Nitride Composites Reinforced by the Braided Silica Fibers
p.980

Fabrication of High-Content Ti₃AlC₂ Powders by Mechanical Alloying
p.983

Mapping of Composition, Phase Transitions and Properties in Oxidized Ti₃SiC₂
p.986

Preparation of Composites from Al and Ti₃AlC₂ and its Tribo-Chemistry Reactions against Low Carbon Steel
p.989

Synthesis, Structure and Properties of Ti₃(Si_xAl_1-x)C₂ Solid Solutions
p.992

Synthesis of Ti₃Si_0.4Al_0.8C_1.8 Solid Solution
p.995

Pressureless Sintering and Properties of Cu/Ti₃AlC₂ Composites
p.998

Argon-Arc Welding of Cu/Ti₃AlC₂ Cermet
p.1001

Home Key Engineering Materials High-Performance Ceramics VPreparation of Composites from Al and Ti3AlC2 and...

Preparation of Composites from Al and Ti₃AlC₂ and its Tribo-Chemistry Reactions against Low Carbon Steel

Abstract:

Al/Ti3AlC2 composites containing 50vol% Al were prepared with high purity of polycrystalline Ti3AlC2 and aluminum powders by pressureless-sintering route at temperatures of 700°C~ 800°C The tribological properties of the composites were investigated by sliding the composites block dryly against low carbon steel disk under high sliding speed. Before and after friction test, the morphology and phase analysis were observed by scanning electron microscope (SEM) and X-ray diffraction (XRD), separately. A definite tribo-glazing layer was found over the worn surface of the composite block, which was the results of tribo-chemical oxidation reaction and the cause forming it could be the high frictional temperature and the mechanical catabolism between the surface of Al/Ti3AlC2 and low carbon steel during sliding friction. The effect of Ti3AlC2 on tribological properties of Al/Ti3AlC2 composite and the possible tribo-chemical reaction mechanism on surface layer of Al/Ti3AlC2 were suggested.

Info:

Periodical:

Key Engineering Materials (Volumes 368-372)

Main Theme:

High-Performance Ceramics V

Edited by:

Wei Pan and Jianghong Gong

Pages:

989-991

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.368-372.989

Citation:

Z. L. Zhang et al., "Preparation of Composites from Al and Ti₃AlC₂ and its Tribo-Chemistry Reactions against Low Carbon Steel", Key Engineering Materials, Vols. 368-372, pp. 989-991, 2008

Online since:

February 2008

Authors:

Zhi Li Zhang, Hong Xiang Zhai, Yang Zhou, Zhen Ying Huang, Ming Xing Ai

Keywords:

Al/Ti₃AlC₂ Composites, Tribo-Chemical Reaction

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References

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[9] W.L. Gu, C.K. Yan and Y.C. Zhou: Scripta Materialia Vol. 49 (2003), p.1075 Fig. 3 Microstructure of one place where tribo-glazing layer peeled off, showing shape of laminated structure.

Paper TitlePages

Effect of Nano-Graphite on Friction Performance of Cu-Based Friction Material

Authors: Jian Hua Du, Yuan Yuan Li, Xiao Hui Zheng

Abstract: The Cu-based friction materials with nano-graphite were prepared through powder metallurgy technology. The microstructure and friction performance were studied through scan electronic microscope (SEM) and friction tester, respectively. The results indicate that coefficient of the Cu-based friction materials with 2 wt% nano-graphite is high and stable. Comparing with the friction materials without n-C, the wear resistance and heat resistance of the friction materials with nano-graphite has been improved by 11 % and 25 %, respectively. The nano-graphite particles will reduce the abrasive wear and enhance the wear resistance of the Cu-based friction materials.

905

Antiwear Behavior of Micro-Arc Oxidated Coating Rubbing on Abrasive Paper

Authors: Yan Tang, Jin Yong Xu, Fang Yong Ye, Cheng Gao, Jing Chun Zhang, Ya Juan Liu

Abstract: To research the tribological properties of micro-arc oxidized ceramic coating in extreme friction condition, ceramic coatings were tested with 1000# waterproof sand paper friction pair for the first time. The phase composition of ceramic coating was analyzed by X-ray diffraction (XRD).Micro structures of ceramic coating surface were observed by scanning electron microscopy (SEM). Friction coefficient of ceramic coating was measured by ball-on-disc wear tester with a 3 mm steel ball. Wear weight loss and wear rate of ceramic coating were measured and calculated by photoelectron balance. The results show that ceramic coatings in various roughnesses have different former wear rates and close wear rates at stable stage. Under water-lubricated condition, wear rate is as low as 0.2 mg/min to 0.3 mg/min. The antiwear behavior of ceramic coating is about 5.3 times compared to aluminium alloy at dry friction. While under water-lubricated condition, the antiwear behavior of ceramic coating improves about 94 times compared to aluminium alloy. The friction coefficient of loose layer is higher than compact layer at dry friction. And there are positive correlation between wear rate and surface roughness of ceramic coating. So it can be verified that compact layer has well antiwear behavior better than loose layer.

1210

Tribological Properties of Plasma-Sprayed 20 wt. % Z_rO₂-Al₂O₃-17 wt.% TiO₂ Coatings on Plain Carbon Steel Substrate

Authors: San Ming Du, Yong Ping Niu, Yong Zhen Zhang

Abstract: In the present study, 20 Wt. % ZrO₂-Al₂O₃-17 wt.% TiO₂ powders were sprayed using a plasma-spray technique after a NiAl bond layer was deposited on plain carbon steel substrate. The produced coatings were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) including energy-dispersive spectroscopy (EDS). The tribological properties of coatings against hard alloy ball were investigated by using a pin-on-disc tribo-meter under dry environments. The predominant wear mechanism of coating is fatigue.

420

Characteristics of the Transfer Film and Tribological Properties of Oxide/PTFE Composites

Authors: Ting Xie, Zheng Hua Zhou, Zhen Xing Xu, Jian Wei Yu, Ming Hua Jiao

Abstract: The formed transfer film on the counterpart surface and tribological properties of PTFE composites filled with Al₂O₃ or SiO₂ were investigated in this paper. The results indicated that under the same friction conditions, the friction coefficients of SiO2/PTFE and Al₂O₃/PTFE are very close to each other, but the wear resistance of SiO₂/PTFE is superior to that of Al₂O₃/PTFE. According to the measured data, the micro-hardness and elastic modulus of the transfer film for SiO₂/PTFE are much better than those of Al₂O₃/PTFE. In addition, the interfacial adhesion strength between the transfer film of SiO₂/PTFE and the counterface is higher. It can be proved that the mechanical properties of transfer films for PTFE composites vary with different fillers and the friction transfer film with better adhesion strength and mechanical property is useful to improve the tribological properties of the composite.

172

Effect of TiB₂ on Pressureless Sintering and Hot Pressing of ZrB₂

Authors: Carolyne Oliveira Davi, Miriam K.H. Yassuda, Rosa Maria Rocha

Abstract: Zirconium diboride (ZrB₂) is a material of particular interest because of the excellent and unique property combination of high melting point and high electrical and thermal conductivity. In this work, the effect of TiB₂ addition on pressureless sintering and hot pressing sintering of ZrB₂ was investigated. Four compositions were prepared with 0, 5, 10 and 20 wt% of TiB₂. First, ZrB₂ and TiB₂ powders were milled by planetary mill with SiC spheres at for 4 h and then they were wet mixed. Compacted samples were pressureless sintered at 2150 oC/1h and hot pressed at 1850 °C/30min with 20 MPa, both in Ar atmosphere. The added TiB₂ completely dissolved into the structure and formed a solid solution with ZrB₂. Addition of TiB₂ in ZrB₂ ceramic improved densification and hardness for both sintering process, but hot pressed samples exhibited better results.