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Journal of Materials Science

, Volume 41, Issue 18, pp 6178–6180 | Cite as

Solid particle erosion of hot-pressed silicon nitride

  • Jong Jip Kim
Letter

Many potential applications of silicon nitride involve the solid particle erosion at elevated temperatures. The typical examples of such applications are the key components in hot section of a gas turbine engine. Degradation of the components often occurs by the interaction between the erosion and hot corrosion processes by sodium sulfates. The hot corrosion attack is known to reduce the strength of silicon nitride by the formation of corrosion pits and dissolution of grain boundaries [1].

The temperature dependence of solid particle erosion behavior has been reported for silicon nitride [2, 3, 4]. The temperature increases the erosion rate of hot-pressed silicon nitride [2], whereas it decreases the erosion rate in the sintered [3] and reaction bonded silicon nitride [4]. This has been explained in terms of the variation in hardness and fracture toughness with temperature. The results, however, were obtained from polished specimens in the absence of oxidation or hot corrosion...

Keywords

Fracture Toughness Erosion Rate Silicon Nitride High Erosion Rate Lateral Crack 

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Copyright information

© Springer Science+Business Media, LLC 2006

Authors and Affiliations

  1. 1.Materials Evaluation CenterKorea Research Institute of Standards and ScienceTaeJeonKorea

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