李凯

研究员 博士生导师 硕士生导师

入职时间:2015-01-21

所在单位:粉末冶金研究院

职务:教授

学历:博士研究生毕业

办公地点:中南大学校本部科技楼

性别:男

联系方式:343417482(QQ);343417482@qq.com QQ:343417482

学位:博士学位

在职信息:在职

主要任职:业务办主任

其他任职:SCI一区期刊Materials Research Letters青年编委成员

毕业院校:中南大学CSU&比利时安特卫普大学University of Antwerp

学科:材料科学与工程

当前位置: 李凯 >> 论文成果

Mechanical properties and oxidation resistance of chemically vapor deposited TiSiN nanocomposite coating with thermodynamically designed compositions

发布时间:2019-04-10

点击次数:

DOI码:10.1016/j.ijrmhm.2018.12.018

发表刊物:International Journal of Refractory Metals and Hard Materials

摘要:TiSiN coating with nanocrystallite surrounded by amorphous phase has attracted a broad interest because of its high hardness and excellent oxidation resistance desired for cutting tools. In the present work, TiSiN coatings were designed and prepared from a gaseous mixture of TiCl4, SiCl4, NH3 and H-2 by low pressure chemical vapor deposition (CVD) process under the guidance of calculated CVD phase diagrams. The calculated compositions and phases in the deposited coatings agree well with the experimental ones. The deposited TiSiN coatings consist of nano-crystalline TiN and amorphous Si3N4 (a-Si3N4). A maximum hardness of about 2800 HV0.02 was obtained, corresponding to a minimum crystallite size of 17.7 nm and a-Si3N4 volume fraction of 13.3% for TiSiN coating deposited at 1123 K under 3.0 KPa. After oxidation at 973 K for 1 h, TiSiN coating kept intact while TiN was completely oxidized. TiSiN nanocomposite coating formed by Si incorporation to TiN displayed superior hardness and oxidation resistance in comparison with those of TiN. The correlation of TiSiN coating hardness with volume fraction of a-Si3N4 and TiN grain size was discussed. The present work demonstrates a novel strategy of thermodynamic calculations and key experiments to deposit CVD TiSiN coatings highly efficiently, which is equally valid for the design of other CVD hard coatings.

合写作者:S. Wang, L. Yin, L. Wu, Z. Zhong, L. Albir

第一作者:L. Qiu

论文类型:期刊论文

通讯作者:Y. Du*, K. Li*

卷号:80

页面范围:30-39

是否译文:

发表时间:2019-04-01

收录刊物:SCI、EI

发布期刊链接:https://doi.org/10.1016/j.ijrmhm.2018.12.018

上一条: Preparation of millimeter scale second phase particles in aluminum alloys and determination of their mechanical properties

下一条: Effect of electron beam irradiation in TEM on the microstructure and composition of nanoprecipitates in Al-Mg-Si alloys