Abstract
(TiB2−TiAl)/TiAl symmetrically function gradient materials (FGM) were prepared by spark plasma sintering (SPS). Owing to the difference of the thermal expansion coefficients between TiB2 and TiAl, a compressive surface stress was introduced to the FGM by the thermal expansion mismatch. The hardness values of the uniform materials and the FGM were tested, respectively. For the FGM with a compressive surface stress, hardness is obviously superior to that of the uniform material. When the FGM was subjected to heat treatment, the hardness decreased due to a partial relaxation of the compressive surface stress.
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MEL bign-chu : Born in 1962
Funded by the Natural Science Foundation of China (No. 50172037)
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Bign-chu, M., Yan-lin, C., Li-ping, H. et al. Hardness measurement of (TiB2−TiAl)/TiAl symmetrically function gradient materials. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 17, 1–3 (2002). https://doi.org/10.1007/BF02852622
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DOI: https://doi.org/10.1007/BF02852622