Elastic properties and microcracking behavior of particulate titanium diboride-silicon carbide composites

Ming Jen Pan; Patricia A. Huffman; David J. Green; John R. Hellmann

doi:10.1111/j.1151-2916.1997.tb02886.x

Elastic properties and microcracking behavior of particulate titanium diboride-silicon carbide composites

Ming Jen Pan, Patricia A. Huffman, David J. Green, John R. Hellmann

Research output: Contribution to journal › Article › peer-review

28 Scopus citations

Abstract

The spontaneous microcracking of particulate TiB₂-SiC composites is studied as a function of TiB₂ volume fraction. The degree of microcracking was examined by measuring elastic properties from room temperature to 1300°C. The results showed that only one composition contains microcracks. All other compositions did not microcrack regardless of TiB₂ volume fraction. This was attributed to the difference in the sintering aids. In particular, the A1₂O₃ sintering aid needed in these compositions had reacted with SiO₂ to form an amorphous grain boundary phase that allowed residual stresses to relax by viscous flow at moderate to high temperatures. The existence of this amorphous grain boundary phase was directly observed by transmission electron microscopy.

Original language	English (US)
Pages (from-to)	692-698
Number of pages	7
Journal	Journal of the American Ceramic Society
Volume	80
Issue number	3
DOIs	https://doi.org/10.1111/j.1151-2916.1997.tb02886.x
State	Published - 1997

All Science Journal Classification (ASJC) codes

Ceramics and Composites
Materials Chemistry

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10.1111/j.1151-2916.1997.tb02886.x

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title = "Elastic properties and microcracking behavior of particulate titanium diboride-silicon carbide composites",

abstract = "The spontaneous microcracking of particulate TiB2-SiC composites is studied as a function of TiB2 volume fraction. The degree of microcracking was examined by measuring elastic properties from room temperature to 1300°C. The results showed that only one composition contains microcracks. All other compositions did not microcrack regardless of TiB2 volume fraction. This was attributed to the difference in the sintering aids. In particular, the A12O3 sintering aid needed in these compositions had reacted with SiO2 to form an amorphous grain boundary phase that allowed residual stresses to relax by viscous flow at moderate to high temperatures. The existence of this amorphous grain boundary phase was directly observed by transmission electron microscopy.",

author = "Pan, {Ming Jen} and Huffman, {Patricia A.} and Green, {David J.} and Hellmann, {John R.}",

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AU - Pan, Ming Jen

AU - Huffman, Patricia A.

AU - Green, David J.

AU - Hellmann, John R.

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N2 - The spontaneous microcracking of particulate TiB2-SiC composites is studied as a function of TiB2 volume fraction. The degree of microcracking was examined by measuring elastic properties from room temperature to 1300°C. The results showed that only one composition contains microcracks. All other compositions did not microcrack regardless of TiB2 volume fraction. This was attributed to the difference in the sintering aids. In particular, the A12O3 sintering aid needed in these compositions had reacted with SiO2 to form an amorphous grain boundary phase that allowed residual stresses to relax by viscous flow at moderate to high temperatures. The existence of this amorphous grain boundary phase was directly observed by transmission electron microscopy.

AB - The spontaneous microcracking of particulate TiB2-SiC composites is studied as a function of TiB2 volume fraction. The degree of microcracking was examined by measuring elastic properties from room temperature to 1300°C. The results showed that only one composition contains microcracks. All other compositions did not microcrack regardless of TiB2 volume fraction. This was attributed to the difference in the sintering aids. In particular, the A12O3 sintering aid needed in these compositions had reacted with SiO2 to form an amorphous grain boundary phase that allowed residual stresses to relax by viscous flow at moderate to high temperatures. The existence of this amorphous grain boundary phase was directly observed by transmission electron microscopy.

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Elastic properties and microcracking behavior of particulate titanium diboride-silicon carbide composites

Abstract

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