文青波

博士生导师 硕士生导师

所在单位:粉末冶金研究院

学历:博士研究生毕业

办公地点:中南大学粉末冶金研究院

性别:男

联系方式:wentsingbo@csu.edu.cn

学位:工学博士学位

在职信息:在职

毕业院校:达姆施塔特工业大学(德国)

学科:材料科学与工程

曾获荣誉:

2011-05-31  当选:  桑德环境奖学金优秀论文特等奖

2010-11-30  当选:  湖南大学长江环境奖学金

2009-05-31  当选:  湖南省优秀大学毕业生

2008-11-30  当选:  国家奖学金

2007-11-30  当选:  国家奖学金

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Dimethylaminoborane-modified copolysilazane as a novel precursor for high-temperature resistant SiBCN ceramics

发布时间:2021-09-04

点击次数:

影响因子:5.3

发表刊物:Journal of the European Ceramic Society

摘要:A novel polyborosilazane (PBSZ) precursor was synthesized by the reaction of copolysilazane (CPSZ) with dimethylaminoborane (DMAB). The resultant PBSZs were characterized by FT-IR and NMR spectroscopy. It was found that both, Bsingle bondH and Nsingle bondH bonds of DMAB, react with CPSZ leading to boron containing copolysilazanes. The polyborosilazanes were pyrolyzed at 900 °C in argon and the precursor-to-ceramic transformation was studied by TG-MS and FT-IR spectroscopy. The modification of CPSZ with DMAB enhances the cross-linking of the resulting PBSZ, which increases the final ceramic yield from 57.8% to 77.5–80.0%. Finally, the ceramics obtained at 900 °C were subsequently annealed at different temperatures ranging from 1200 to 1800 °C. The heat-treated products were characterized by X-ray powder diffraction and electron microscopy. Accordingly, the resulting SiBCN ceramics exhibit significantly enhanced high-temperature-resistance with respect to decomposition and crystallization as compared with boron-free CPSZ-derived SiCN ceramics. TEM results support that the thermal stability is due to the segregation of a BN(C) phase as interlayer between Si3N4 nanocrystals formed during heat-treatment of SiBCN at T > 1500 °C.

合写作者:Hao Min, Le Yang, Meiyu Chen, Qingbo Wen

第一作者:Cong Zhou

论文类型:期刊论文

通讯作者:Zhaoju Yu

文献类型:J

卷号:34

期号:15

页面范围:3579-3589

是否译文:

发表时间:2014-12-01

收录刊物:SCI

发布期刊链接:https://www.sciencedirect.com/science/article/pii/S0955221914003197

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