Effects of Y2O3 and ZrO2 on the Densification of Si3N4-Zr(Y)O2 Composites |
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| Authors: | Jae Ryong Kim Do-Hyeong Kim Chong Hee Kim |
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| Affiliation: | Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Cheongryang, Seoul, Korea |
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| Abstract: | ![]()
The effects of ZrO2 and Y2O3 on the densification of hotpressed Si3N4-Zr(Y)O2 composites have been studied. High density could not be obtained by the addition of pure or 3-mol%-Y2O3-doped ZrO2 in this composite; however, nearly full density (>97%) could be obtained in Si3N4 using 6- and 8-mol%-Y2O3-doped ZrO2. It is concluded that Y2O3 diffusing out from the added Zr(Y)O2 promoted the densification and that ZrO2 also had some role in the formation of an oxynitride glass. |
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| Keywords: | silicon nitride yttria composites diffusion densification |
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