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:中南大学本部校区三一大楼617

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:

2018-03-05  当选:  玛丽居里优秀研究计划奖

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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Single-source-precursor synthesis and high-temperature evolution of a boron-containing SiC/HfC(N) ceramic micro/nano composite

发布时间:2021-09-03

点击次数:

影响因子:5.3

DOI码:10.1016/j.jeurceramsoc.2020.05.031

发表刊物:Journal of the European Ceramic Society

摘要:A boron-containing SiHfC(N,O) amorphous ceramic was synthesized upon pyrolysis of a single-source-precursor at 1000 °C in Ar atmosphere. The high-temperature microstructural evolution of the ceramic at high temperatures was studied using X-ray powder diffraction, Raman spectroscopy, solid-state nuclear magnetic resonance spectroscopy and transmission electron microscopy. The results show that the ceramic consists of an SiHfC(N,O)-based amorphous matrix and finely dispersed sp2-hybridized boron-containing carbon (i.e. ByC). High temperature annealing of ByC/SiHfC(N,O) leads to the precipitation of HfCxN1-x nanoparticles as well as to β-SiC crystallization. After annealing at temperatures beyond 1900 °C, HfB2 formation was observed. The incorporation of boron into SiHfC(N,O) leads to an increase of its sintering activity, consequently providing dense materials possessing improved mechanical properties as compared to those of boron-free SiC/HfC. Thus, hardness and elastic modulus values up to 25.7 ± 5.3 and 344.7 ± 43.0 GPa, respectively, were measured for the dense monolithic SiC/HfCxN1-x/HfB2/C ceramic nano/micro composite.

合写作者:Ralf Riedel

第一作者:Qingbo Wen

论文类型:期刊论文

通讯作者:Zhaoju Yu, Emanuel Ionescu

学科门类:工学

一级学科:材料科学与工程

文献类型:J

卷号:41

期号:5

页面范围:3002-3012

是否译文:

发表时间:2021-05-01

收录刊物:SCI

发布期刊链接:https://www.sciencedirect.com/science/article/pii/S0955221920303824

上一条: Formation of Highly Active NiO(OH) Thin Films from Electrochemically Deposited Ni(OH)2 by a Simple Thermal Treatment at a Moderate Temperature: A Combined Electrochemical and Surface Science Investigation

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