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Fabrication, Mechanical Properties, and Tribological Behaviors of Ti 3 Al 0.8 Sn 0.4 C 2 Solid Solution by Two‐Time Hot‐Pressing Method
Author(s) -
Xu Hao,
Huang Zhenying,
Zhai Hongxiang,
Li Mengqi,
Liu Xiaohan,
Zhou Yang
Publication year - 2014
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12265
Subject(s) - materials science , sintering , hot pressing , tribology , flexural strength , vickers hardness test , composite material , delamination (geology) , indentation hardness , metallurgy , microstructure , paleontology , biology , subduction , tectonics
A nearly pure, dense Ti 3 Al 0.8 Sn 0.4 C 2 solid solution bulk has been prepared by two‐time hot‐pressing sintering a purity Ti 3 Al 0.8 Sn 0.4 C 2 powders at 1450°C with 30 MPa for 30 min in Ar atmosphere. The Ti 3 Al 0.8 Sn 0.4 C 2 powders have been synthesized by sintering a mixture of Ti, Al, Sn, and TiC powders with a molar ratio of 1:0.8:0.4:1.85 at 1450°C for 5 min. The Vickers microhardness and flexural strength of the Ti 3 Al 0.8 Sn 0.4 C 2 have been measured to be 3.51 GPa and 620 MPa, respectively. Buckling and kinking of the layered structure as well as grain delamination crack deflection have been extensively observed around indentations and on the fracture surfaces. The tribological behaviors have been investigated by dry sliding a low‐carbon steel disk. Ti 3 Al 0.8 Sn 0.4 C 2 bulk has a friction coefficient of 0.3–0.48 and a very low wear rate of 0.4–4.3 × 10 −6 mm 3 /Nm for the test conditions. These tribological properties are attributed to the presence of a compact self‐generating film, which covers uniformly over the friction surface of Ti 3 Al 0.8 Sn 0.4 C 2 .