Huang, Bo Tan, Zhe
Frontiers in Chemistry
The host-guest chemistry of metal–organic frameworks (MOFs) has been attracting increasing attention owing to the outstanding properties derived from MOFs-guests combinations. However, there are large difficulties involved in the syntheses of the host-guest MOF systems with air-sensitive metal complexes. In addition, the behaviors on host-guest int...
Chen, Chao Liu, Yongsheng Yue, Wei Ye, Fang Wang, Jing Zeng, Qingfeng
Frontiers in Materials
Wave-transparent ceramic composites with excellent comprehensive performances are of particular significance for the development of space vehicles. In this study, Si3N4w was prepared by the gel-casting process and then combined with chemical vapor infiltration (CVI)-obtained Si3N4 to yield Si3N4w/Si3N4 composites with five Si3N4w volume fractions. ...
Jian, Xian Tian, Wei Li, Jinyao Deng, Longjiang Zhou, Zuowan Zhang, Li Lu, Haipeng Yin, Liangjun Mahmood, Nasir
ACS applied materials & interfaces
Most microwave absorbers lose their function under harsh working conditions, such as a high temperature and an oxidative environment. Here, we developed a heterogeneous ZrN0.4B0.6/SiC nanohybrid via combined catalytic chemical vapor deposition (CCVD) and chemical vapor infiltration (CVI) processes using ZrB2 as the starting material. The compositio...
Hu, Chunxia Li, Hejun Zhang, Shouyang Li, Wei Li, Ni
Science China Materials
A complete mechanism of methane pyrolysis is proposed for chemical vapor infiltration of pyrocarbon with different textures, which contains a detailed homogeneous mechanism for gas reactions and a lumped heterogeneous mechanism for pyrocarbon deposition. This model is easily applied to simulate gas compositions and pyrocarbon deposition in a vertic...
Maille, L. Guette, A. Pailler, R. Le Petitcorps, Y. Weisbecker, P.
Powder Metallurgy and Metal Ceramics
This paper reports on the development of a new process for the fabrication of a C/C composite for aeronautic and aerospace industries, in order to reduce the infiltration time of the carbon perform. The infiltration of a carbon fibrous preform by means of a hydrocarbon in the supercritical fluid state is done at high temperature in order to obtain ...
Zhang, Zezhi Jiang, Zhenxi Wang, Liucheng Li, Chengwei Wang, Fu-an
Coke and Chemistry
To solve the energy-saving and emission-reduction problem which caused by the deterioration of the thermal properties of coke in blast furnace and to improve the technologies applied to the inhibition to coke deterioration, benzene pyrolysis carbons were used to infiltrate into coke to inhibit coke deterioration for improving the thermal properties...
La matrice des composites thermostructuraux est obtenue par infiltration chimique en phase vapeur : une préforme placée dans un four est pénétrée par des gaz précurseur qui vont déclencher la formation matricielle par réaction hétérogène. Une modélisation numérique de ce procédé est proposée. Deux programmes furent développés puis validés. Le premi...
Liu, JQ Huang, J Gong, XJ Wang, JF Xu, K Qiu, YX Cai, DM Zhou, TF Ren, GQ Yang, H
GaN nanowire (NW) arrays have been fabricated by the electrodeless photoelectrochemical (PEC) etching method for the first time. Under appropriate conditions, the etching process is just a dislocation-hunted process, in which the etching solution "digs down'' along the threading dislocations, resulting in the formation of GaN NWs by preferentially ...