Degradation of structural ceramics by erosion

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Materials wastage by solid-particle erosion can be severe and can limit lifetimes. This paper will review the theoretical description of solid-particle erosion in brittle materials, which is well-developed for monolithic ceramics. The models can usually account for effects from the principal projectile properties of size, impact velocity, and impact angle. Materials parameters such as fracture toughness and hardness can be included. Steady-state erosion measurements on a wide variety of ceramics, ranging from Si single crystals to SiC-whisker-reinforced Al{sub 2}O{sub 3}, are reviewed and compared with the models. It is believed that R-curve behavior and/or particle fragmentation is responsible for discrepancies ... continued below

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19 p.

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Routbort, J.L. December 1, 1994.

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Description

Materials wastage by solid-particle erosion can be severe and can limit lifetimes. This paper will review the theoretical description of solid-particle erosion in brittle materials, which is well-developed for monolithic ceramics. The models can usually account for effects from the principal projectile properties of size, impact velocity, and impact angle. Materials parameters such as fracture toughness and hardness can be included. Steady-state erosion measurements on a wide variety of ceramics, ranging from Si single crystals to SiC-whisker-reinforced Al{sub 2}O{sub 3}, are reviewed and compared with the models. It is believed that R-curve behavior and/or particle fragmentation is responsible for discrepancies between theory and experimental results for composite ceramics. In addition, the theories make no attempt to describe threshold or incubation effects.

Physical Description

19 p.

Notes

OSTI as DE95013673

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  • Research Assistant Task Force conference, Charlotte, NC (United States), 11-13 Apr 1995

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  • Other: DE95013673
  • Report No.: ANL/ET/CP--85172
  • Report No.: CONF-9504156--2
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 90712
  • Archival Resource Key: ark:/67531/metadc793008

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • December 1, 1994

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  • Dec. 19, 2015, 7:14 p.m.

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  • Jan. 6, 2016, 2:59 p.m.

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Routbort, J.L. Degradation of structural ceramics by erosion, article, December 1, 1994; Illinois. (digital.library.unt.edu/ark:/67531/metadc793008/: accessed November 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.