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Ceramics |
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Name |
Description |
Synthesis |
Disadvantages |
Advantages |
Links |
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Phase transformation toughened zirconia(Zr02) |
Monoclinic-stable phase, larger volume Tetragonal phase-smaller volume, unstable at RT, but stabilized temporarily by 3% yittria(Y2O3), |
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Higher strength-crack propagation causes phase transformation from tetragonal to monoclinic. The increase in volume stops crack. |
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SiC whiskers |
Whiskers-small, 200/1 aspect ratio, defect free |
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High strength/modulus |
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SiC fiber |
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Yajima approach |
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B4C yarn |
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Carbon fiber precursor, rapid |
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High strength/modulus |
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TiB2 fiber |
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Carbon fiber |
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PAN (polyacrylnitrile) precursor |
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I. High modulus II. Activation with chromic acid for bonding with composite matrix |
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TiN fiber |
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Diamond |
coating |
I. 30 million year-old volcanoes II. High pressures |
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