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Phase separation in pre-ceramic polymers blends and its influence on the microstructure of ZrC/SiC ceramic derivatives
Li, Jiewen1,2; Yu, Shouquan1; Zhou, Yang1; Ge, Min1; Qian, Yangbao1; Zhang, Weigang1
2015-10-01
Source PublicationMATERIALS LETTERS
ISSN0167-577X
Volume156Issue:OCTPages:72-75
Abstract

Ultra-high temperature ceramics (UHTCs) composed of ZrC and SiC were fabricated via pyrolysis of hybrid polymeric precursors comprising of polycarbosilane (PCS) and polyzirconobutanediol (PZC). Phase separation in these polymers blends during different removal methods of toluene solution by freezing drying, vacuum drying and rotary evaporation was studied. Elements and phase distribution as well as molecular aggregation state in the hybrid polymeric precursors and the pyrolyzed composite ceramics were characterized with AFM and SEM. It was found that macromolecules of pre-ceramic polymers aggregated spontaneously in the hybrid precursor solution and formed molecular clusters within dozens of nanometers, and the resultant phase separation during removal of toluene solution exhibits strongly impact on the microstructure of the derived UHTCs after being pyrolyzed at temperature above 1000 degrees C which was controlled by solvent removing time. (C) 2015 Elsevier B.V. All rights reserved.

KeywordCeramic Composites Polymers Atomic Force Microscopy Structural
SubtypeArticle
WOS HeadingsScience & Technology ; Technology ; Physical Sciences
DOI10.1016/j.matlet.2015.04.118
Indexed BySCI
Language英语
WOS KeywordCOMPOSITES
WOS Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000357550300020
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/19402
Collection多相复杂系统国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Li, Jiewen,Yu, Shouquan,Zhou, Yang,et al. Phase separation in pre-ceramic polymers blends and its influence on the microstructure of ZrC/SiC ceramic derivatives[J]. MATERIALS LETTERS,2015,156(OCT):72-75.
APA Li, Jiewen,Yu, Shouquan,Zhou, Yang,Ge, Min,Qian, Yangbao,&Zhang, Weigang.(2015).Phase separation in pre-ceramic polymers blends and its influence on the microstructure of ZrC/SiC ceramic derivatives.MATERIALS LETTERS,156(OCT),72-75.
MLA Li, Jiewen,et al."Phase separation in pre-ceramic polymers blends and its influence on the microstructure of ZrC/SiC ceramic derivatives".MATERIALS LETTERS 156.OCT(2015):72-75.
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