Influence of Silicon Nitride composites from Coprecipitation coated powders

Home > Archive>Volume 47, Issue S1, 2018 >298-301

Influence of Silicon Nitride composites from Coprecipitation coated powders
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                        Ye ChaochaoYe Chaochao
Key Laboratory for Anisotropy and Texture of Materials of Ministry of Education ATM,Northeastern University
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Jiang YanJiang Yan
Key Laboratory for Anisotropy and Texture of Materials of Ministry of Education ATM,Northeastern University
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Ru HongqiangRu Hongqiang
Key Laboratory for Anisotropy and Texture of Materials of Ministry of Education ATM,Northeastern University
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Yue XinyanYue Xinyan
Key Laboratory for Anisotropy and Texture of Materials of Ministry of Education ATM,Northeastern University
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Wang WeiWang Wei
Key Laboratory for Anisotropy and Texture of Materials of Ministry of Education ATM,Northeastern University
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Affiliation:Key Laboratory for Anisotropy and Texture of Materials of Ministry of Education ATM,Northeastern University,Key Laboratory for Anisotropy and Texture of Materials of Ministry of Education ATM,Northeastern University,Key Laboratory for Anisotropy and Texture of Materials of Ministry of Education ATM,Northeastern University,Key Laboratory for Anisotropy and Texture of Materials of Ministry of Education ATM,Northeastern University,Key Laboratory for Anisotropy and Texture of Materials of Ministry of Education ATM,Northeastern University
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Abstract:

Two types of commeriacl silicon nitride powders with poor dispersibilities have been studied, and influences of acid leaching and 950 ℃ thermal oxidation on the coprecipitation for the powders have been investigated sysmatically. The evolution of nano-oxides during the reaction causes the product to precipitation, and the calcinations of this precipitation gives nanocomposites powders(Al₂O₃-Y₂O₃) with extremely fine, uniform grains, and phase domains. microstructure properties of composites were investigated with scanning electron microscopy (SEM) (TEM) and Fourier Transform infrared spectroscopy (FTIR). The peak of the Si-O-Si groups emerge at higher frequencies after thermal oxidation, and the isoelectric point of 950 ℃ thermal oxidation powders was found to be less than 2, respectively. For the coprecipitation powders, the size of Al₂O₃-Y₂O₃ composites powders is 20~ 100nm.

Key words:acid; calcined; Silicon Nitride; coprecipitation

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[Ye Chaochao, Jiang Yan, Ru Hongqiang, Yue Xinyan, Wang Wei. Influence of Silicon Nitride composites from Coprecipitation coated powders[J]. Rare Metal Materials and Engineering,2018,47(S1):298~301.]
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Received:July 03,2017
Revised:July 04,2017
Adopted:January 29,2018
Online: October 22,2018
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