Image-based numerical modeling for the effective thermo-elastic property of 4D Carbon/Carbon composite at high temperatures

2021 ◽  
pp. 113881
Author(s):  
Mohammad Zahid ◽  
Rajneesh Sharma ◽  
Atul Ramesh Bhagat ◽  
Priyanka Karra
Keyword(s):  
Numerical Modeling ◽  
Elastic Property ◽  
High Temperatures ◽  
Carbon Composite

Bearing capacity of a threaded pair made of spatially reinforced carbon-carbon composite materials at high temperatures

2021 ◽  
pp. 30-34
Author(s):  
Keyword(s):  
Composite Materials ◽  
Bearing Capacity ◽  
High Temperatures ◽  
Limit Load ◽  
Carbon Composite ◽  
Reinforcement Scheme ◽  
Carbon Composite Material ◽  
Carbon Composite Materials ◽  
Threaded Joints ◽  
Joint Limit

The bearing capacity of a threaded pair made of spatially reinforced carbon-carbon composite materials (CCCM) with a 4DL reinforcement scheme in the temperature range from 20 to 2500 °C is experimentally determined. Recommendations are given for the design of CCCM threaded joints for operation at high temperatures. Keywords: carbon-carbon composite material, threaded joint, limit load, bearing capacity, threaded pair, high temperature. [email protected]

Retainer-Dependent Wear of Silicon Nitride Bearings at High Temperatures

1994 ◽  
Vol 116 (3) ◽  
pp. 463-469
Author(s):  
Y. Mutoh ◽  
K. Tanaka ◽  
M. Uenohara
Keyword(s):  
High Temperature ◽  
Silicon Nitride ◽  
Wear Rate ◽  
High Temperatures ◽  
Carbon Composite ◽  
The Self ◽  
Soft Or ◽  
Bearing Life ◽  
Sintered Alloys

Several retainer materials for high-temperature silicon nitride bearings to be used in air were examined with a high-temperature rolling three-ball tester. The “soft” or “self-lubricating” retainer materials (metal-bonded MoS2-WS2 alloys, a carbon-carbon composite and graphite) tended to yield longer bearing life, lower silicon nitride wear rate and lower traction coefficients than the hard retainers (Fe-based sintered alloys, chromia and silicon nitride). The main problem in the use of the self-lubricating retainer materials was their rapid wear by tribo-oxidation at high temperatures.

Creep of carbon yarn and a carbon-carbon composite at high temperatures and high stresses

Carbon ◽  
1989 ◽  
Vol 27 (3) ◽  
pp. 403-415 ◽  
Author(s):  
George sines ◽  
Yang Zheng ◽  
Brian D. Vickers
Keyword(s):  
High Temperatures ◽  
Carbon Composite

Features of testing composition materials on shear at high temperatures

2020 ◽  
pp. 180-186
Author(s):  
К.В. Шаньгин
Keyword(s):  
High Temperatures ◽  
Shear Test ◽  
Measurement Accuracy ◽  
Physical And Mechanical Properties ◽  
Carbon Composite ◽  
Space Technology ◽  
Composition Materials ◽  
Carbon Composite Materials ◽  
Properties Of Materials ◽  
Materials Used

Рассмотрены проблемы, возникающие при испытании на сдвиг при высоких температурах, объемно - армированных углерод - углеродных композиционных материалов, применяемых при создании ракетно-космической техники. Предложены варианты повышения точности измерения, достоверности определяемых физико-механических свойств материалов. Problems arising during shear test at high temperatures of volume - reinforced carbon - carbon composite materials used in creation of rocket and space technology are considered. Disclosed are versions of improving measurement accuracy and reliability of determined physical and mechanical properties of materials.

scholarly journals Effect of MoSi2-Si3N4/SiC Multi-Layer Coating on the Oxidation Resistance of Carbon/Carbon Composites above 1770 K

2020 ◽  
Vol 4 (3) ◽  
pp. 86 ◽  
Author(s):  
Imran Abbas ◽  
Yanxiang Wang ◽  
Hassan Elahi ◽  
Muhammad Ali Siddiqui ◽  
Mudaser Ullah ◽  
...  
Keyword(s):  
Oxidation Resistance ◽  
High Temperatures ◽  
Carbon Matrix ◽  
Carbon Composite ◽  
Vital Role ◽  
Carbon Composites ◽  
Micro Cracks ◽  
Coated Carbon ◽  
And Diffusion ◽  
Layer Coating

To improve the oxidation resistance of carbon/carbon composites at high temperatures (>1770 K), they were coated with MoSi2-Si3N4/SiC. The slurry and pack cementation methods were adopted to deposit the inner SiC layer and outer MoSi2-Si3N4 layer. The phase composition, microstructure, and elemental distributions in the coating were analyzed using SEM, XRD, EDS, and Raman spectroscopy. Oxidation tests show that the deposited multi-layer coating can protect the carbon/carbon matrix from oxidation at high temperatures (>1770 K) for 150h and that the coating can withstand 40 thermal cycles between 1773 and 300 K. It is observed that Si3N4 assists in the formation of a dense SiO2 layer at a high temperature, which plays a vital role in increasing the thermal cyclic and oxidation resistance of the coating itself. The weight loss of coated carbon/carbon composite is attributed to the formation of micro-cracks and diffusion of SiO2, MoO3, and N2 out of the material at high temperatures.

Numerical Modeling of Forming a Preform under High Temperature Creep

2014 ◽  
Vol 1040 ◽  
pp. 898-902 ◽  
Author(s):  
Egor E. Rogachev ◽  
Marina V. Polonik ◽  
Olga V. Dudko ◽  
Evgenii V. Murashkin
Keyword(s):  
Numerical Modeling ◽  
High Temperature ◽  
High Temperatures ◽  
High Temperature Creep ◽  
Temperature Creep ◽  
Deformation Modes

The object of research is the process of forming metal preform with predetermined configuration under creep at high temperatures. Two deformation modes have been considered – “cold” and “hot”. The results of numerical modeling of two deformation modes using the system MSC Marc are presented.

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