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材料研究学报  2010, Vol. 24 Issue (5): 483-486    
  研究论文 本期目录 | 过刊浏览 |
TiAl合金防护涂层先驱溶胶的热分解和晶化过程
田晓, 贾清, 崔玉友, 杨锐
中国科学院金属研究所 沈阳 110016
Thermal Decomposition and Crystallization of Precursor Sol for Preparing Oxidation Resistant Coatings on Intermetallic TiAl
TIAN Xiao, JIA Qing, CUI Yuyou, YANG Rui
Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016
引用本文:

田晓 贾清 崔玉友 杨锐. TiAl合金防护涂层先驱溶胶的热分解和晶化过程[J]. 材料研究学报, 2010, 24(5): 483-486.
. Thermal Decomposition and Crystallization of Precursor Sol for Preparing Oxidation Resistant Coatings on Intermetallic TiAl[J]. Chin J Mater Res, 2010, 24(5): 483-486.

全文: PDF(993 KB)  
摘要: 研究了作为涂层粘结剂的Y溶胶转变为凝胶后在加热过程中发生的热分解和相变过程, 结果表明: 在115℃凝胶中大量有机溶剂和自由水逸出, 在180--280℃凝胶分子间发生缓慢的缩合反应并脱去结合水, 在380℃羧酸盐分解为碱式碳酸盐, 在440℃碳酸盐分解并析出Y2O3微晶, 在600℃Y凝胶分解完全并转化为α--Y2O3。
关键词 无机非金属材料  溶胶--凝胶法  Y2O3  TG--DSC--MS  热分解    
Abstract:The thermal decomposition and subsequent crystallization process of Y sol after gelation were investigated by thermogravimetry--differential scanning calorimetry--mass spectrometry (TG--DSC--MS) coupling techniques, X-ray diffraction  (XRD) and Fourier transform infrared spectrometry (FTIR). The results show that Y gel loses lots of organic solvents and free water at 115℃. The hydroxyl condensation between gel molecules takes place slowly from 180℃ to 280℃. DSC curve of Y gel has two exothermic peaks in the range of 280--600℃, which are contributed to the transformation from carboxylate to subcarbonate at 380℃ and the formation of Y2O3 crystallite from decomposition products of subcarbonate at 440℃. Y gel completely transforms into α--Y2O3 at 600℃.
Key wordsinorganic non--metallic materials         sol--gel     Y2O3     TG--DSC--MS     thermal decomposition
收稿日期: 2010-02-01     
ZTFLH: 

TB304

 
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