The relevance of the surface structure and surface chemistry of carbon fibres in their adhesion to high temperature thermoplastics

1994 ◽  
Vol 29 (15) ◽  
pp. 3984-3992 ◽  
Author(s):  
G. Krekel ◽  
U. J. Zielke ◽  
K. J. Hüttinger ◽  
W. P. Hoffman
Keyword(s):  
High Temperature ◽  
Surface Chemistry ◽  
Surface Structure ◽  
Carbon Fibres

Surface Chemistry of 2-Propanol on TiO2(110):  Low- and High-Temperature Dehydration, Isotope Effects, and Influence of Local Surface Structure

2007 ◽  
Vol 111 (29) ◽  
pp. 11059-11067 ◽  
Author(s):  
Oleksandr Bondarchuk ◽  
Yu Kwon Kim ◽  
J. M. White ◽  
Jooho Kim ◽  
Bruce D. Kay ◽  
...  
Keyword(s):  
High Temperature ◽  
Surface Chemistry ◽  
Surface Structure ◽  
Isotope Effects ◽  
Local Surface

High-Temperature Behavior and Surface Chemistry of Carbide MXenes Studied by Thermal Analysis

2019 ◽  
Vol 31 (9) ◽  
pp. 3324-3332 ◽  
Author(s):  
Mykola Seredych ◽  
Christopher Eugene Shuck ◽  
David Pinto ◽  
Mohamed Alhabeb ◽  
Eliot Precetti ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
High Temperature ◽  
Surface Chemistry ◽  
Temperature Behavior ◽  
High Temperature Behavior

PROCESSING OF ULTRA-HIGH TEMPERATURE CERAMIC MATRIX COMPOSITES (UHTCMCS) THROUGH RF ENHANCED CHEMICAL VAPOUR INFILTRATION (RF-CVI)

2021 ◽  
Author(s):  
VINOTHINI VENKATACHALAM, ◽  
JON BINNER ◽  
THOMAS REIMER ◽  
BUCKARD ESSER ◽  
STEFANO MUNGIGUERRA ◽  
...  
Keyword(s):  
High Temperature ◽  
Carbon Fibre ◽  
Chemical Vapor Infiltration ◽  
Matrix Composites ◽  
Carbon Fibres ◽  
Temperature Oxidation ◽  
Ceramic Phase ◽  
Wide Range ◽  
The University ◽  
Ultra High Temperature

Carbon fibre (Cf) reinforced Ultra High Temperature Ceramic (UHTC) Matrix Composites (UHTCMCs) have proven to be excellent materials that can survive nearly 3000°C in highly oxidizing environments along with a good specific strength. Consequently, they have excellent potential for use in aerospace applications such as rocket nozzle throats and thermal protection systems (TPS). Due to the presence of the carbon fibres, UHTCMCs offer high strength and modulus combined with excellent thermal shock behaviour whilst the presence of the ultra-high temperature ceramic phase protects the carbon fibres at the application temperatures. High temperature oxidation, thermal ablation behaviour and mechanical properties of the UHTCMC’s relies heavily on the bonding between the carbon fibre and matrices especially the oxides formed to avoid any progressive failure and predict the life of the components. In the present investigation, a radio frequency assisted chemical vapor infiltration (RF-CVI) technique has been used to make the 2.5D Cf reinforced ZrB2, ZrB2/carbon matrices composites with various interphase materials. The advantage of RF heating is that it creates an inverse temperature profile in the sample, which means that the infiltration starts from inside and progresses outwards. This allows the time needed for processing to be reduced very significantly compared to the conventional CVI process. This presentation will report on the latest results from the research that has been undertaken at the University of Birmingham, including the results from a wide range of testing that has been undertaken at both DLR in Germany and the University of Naples in Italy.

Investigation of the surface chemistry of Teflon. 1. Effect of low energy argon ion irradiation on surface structure

Langmuir ◽  
1993 ◽  
Vol 9 (3) ◽  
pp. 740-748 ◽  
Author(s):  
Beng Jit Tan ◽  
Mebrahtu Fessehaie ◽  
Steven L. Suib
Keyword(s):  
Surface Chemistry ◽  
Surface Structure ◽  
Ion Irradiation ◽  
Low Energy ◽  
Argon Ion

Modification of Activated Carbon and its Application on Adsorption of UDMH Gas

2013 ◽  
Vol 634-638 ◽  
pp. 1026-1030 ◽  
Author(s):  
Huan Chun Wang ◽  
Xiao Li Gou ◽  
Xiao Meng Lv
Keyword(s):  
Activated Carbon ◽  
High Temperature ◽  
Transition Metal ◽  
Surface Structure ◽  
Functional Groups ◽  
Room Temperature ◽  
Activated Carbons ◽  
Metal Solution ◽  
Modified Activated Carbons

Two kinds of modified activated carbons were prepared by dipping with Zn(NO3)2 solution and by reducing in the atmosphere of N2 at high temperature respectively, which were characterized by FTIR,DSC,SEM and EDS. The surface structure was strongly changed in the process, along with the changes of chemical functional groups. The results of adsorption experiments revealed that the adsorbent capacities of UDMH gas at room temperature were enhanced obviously by modification compared with the raw activated carbon, especially dipped by transition metal solution. The mechanism probably involved was also discussed.

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