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In order to design silicon nitride components to be used in HT structural applications under aggressive environments encountered in coal gasifiers, it is important to collect fundamental data on corrosion properties and on mechanical strength degradation. Commercially available hot-pressed Si(3)N(4) samples have been corroded in a 0.4% H(2)S + 0.75% H(2)O + H(2) bal. atmosphere at 1300 C, a gas composition similar to that found in coal gasifiers. The fracture origin, as well as the strength and Weibull modulus, are evaluated at both room and high temperatures in order to elucidate the material's degradation. This represents a step towards the understanding of the situation where both mechanical loading and corrosion at HT interact.

Additional information

Authors: SARAIVA MARTINS C, JRC Petten (NL);STEEN M, JRC Petten (NL);BRESSERS J, JRC Petten (NL);GUERRA ROSA L, Instituto Superior Técnico, Lisboa (PT)
Bibliographic Reference: Paper presented: 2nd Meeting of the European Ceramic Society, Augsburg (DE), Sept. 11-14, 1991
Availability: Available from (1) as Paper EN 36505 ORA
Record Number: 199111609 / Last updated on: 1994-12-02
Original language: en
Available languages: en
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