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Vickers microhardness as a function of the indentation load and of grain orientation was studied in individual grains of a gas pressure sintered polycrystalline silicon nitride using indentation loads in the range from 1 g to 50 g. The microhardness values are lower than the microhardness of beta-Si(3)N(4) single crystals, which is probably caused by the softening of the silicon nitride lattice by the presence of oxygen and aluminium atoms. The indentation load size effect (ISE) was more evident in the prismatic planes of the grains.

Additional information

Authors: DUSZA J, JRC Petten (NL);STEEN M, JRC Petten (NL)
Bibliographic Reference: Article: Journal of the American Ceramic Society - Communications (1998)
Record Number: 199811324 / Last updated on: 1998-11-10
Original language: en
Available languages: en