Abstract
The effect of atmosphere control on the sintering behaviour of TiB2-20 wt% Ni ceramics was investigated. Sintering was performed at 1700 °C for 1h with commercial TiB2 powders produced by the earbothermic reaction. Under a fixed single atmosphere such as vacuum or Ar, densification was limited and large pores remained. However, a sintered density above 99% of theoretical could be achieved by a two-step sintering procedure in which the atmosphere was changed from vacuum to Ar at 1600 °C during the heat-up with subsequent isothermal sintering being performed at 1700 °C for 1h. Qualitative considerations about these phenomena are discussed.
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Kim, WJ., Kim, DH., Kang, E.S. et al. Two-step sintering of a TiB2-Ni cermet. J Mater Sci 31, 5805–5809 (1996). https://doi.org/10.1007/BF01160832
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DOI: https://doi.org/10.1007/BF01160832