Growth and mechanical properties of Nb Cr carbide coatings on graphite by TRD technique

2021 ◽  
pp. 105660
Author(s):  
Zhenyu Wu ◽  
Huawen Qing ◽  
Haibo Guo ◽  
Yigang Chen
Keyword(s):  
Mechanical Properties ◽  
Carbide Coatings

Tribo-mechanical properties of reactive magnetron sputtered transition metal carbide coatings

2017 ◽  
Vol 114 ◽  
pp. 234-244 ◽  
Author(s):  
D. Dinesh Kumar ◽  
N. Kumar ◽  
S. Kalaiselvam ◽  
R. Radhika ◽  
Arul Maximus Rabel ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Transition Metal ◽  
Transition Metal Carbide ◽  
Reactive Magnetron ◽  
Metal Carbide ◽  
Carbide Coatings

Control of stoichiometry, microstructure, and mechanical properties in SiC coatings produced by fluidized bed chemical vapor deposition

2008 ◽  
Vol 23 (6) ◽  
pp. 1785-1796 ◽  
Author(s):  
E. López-Honorato ◽  
P.J. Meadows ◽  
J. Tan ◽  
P. Xiao
Keyword(s):  
Mechanical Properties ◽  
Silicon Carbide ◽  
Chemical Vapor Deposition ◽  
Young’S Modulus ◽  
Fluidized Bed ◽  
Vapor Deposition ◽  
Young's Modulus ◽  
Chemical Vapor ◽  
Carbide Coatings ◽  
Fuel Particles

Stoichiometric silicon carbide coatings the same as those used in the formation of TRISO (TRistructural ISOtropic) fuel particles were produced by the decomposition of methyltrichlorosilane in hydrogen. Fluidized bed chemical vapor deposition at around 1500 °C, produced SiC with a Young’s modulus of 362 to 399 GPa. In this paper we demonstrate the deposition of stoichiometric silicon carbide coatings with refined microstructure (grain size between 0.4 and 0.8 μm) and enhanced mechanical properties (Young’s modulus of 448 GPa and hardness of 42 GPa) at 1300 °C by the addition of propene. The addition of ethyne, however, had little effect on the deposition of silicon carbide. The effect of deposition temperature and precursor concentration were correlated to changes in the type of molecules participating in the deposition mechanism.

BORON CARBIDE COATINGS : CORRELATION BETWEEN MECHANICAL PROPERTIES AND LPCVD PARAMETERS VALUES

1989 ◽  
Vol 50 (C5) ◽  
pp. C5-311-C5-321 ◽  
Author(s):  
J. REY ◽  
G. MALE ◽  
Ph. KAPSA ◽  
J. L. LOUBET
Keyword(s):  
Mechanical Properties ◽  
Boron Carbide ◽  
Carbide Coatings

scholarly journals Experimental and FEM based investigation of the influence of the deposition temperature on the mechanical properties of SiC coatings

2021 ◽  
Vol 10 (1) ◽  
pp. 139-151
Author(s):  
Thomas Schlech ◽  
Siegfried Horn ◽  
Charles Wijayawardhana ◽  
Arash Rashidi
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Silicon Carbide ◽  
Deposition Temperature ◽  
Chemical Vapor ◽  
Material Model ◽  
Element Model ◽  
Substrate Material ◽  
Plastic Properties ◽  
Carbide Coatings

AbstractScanning electron microscopy shows that the microstructure, in particular the overall grain size, of chemical vapor deposited silicon carbide coatings depends on the deposition temperature. So far, the influence of the microstructure on the mechanical properties of such coatings is not well described in literature. To investigate the influence of the deposition temperature on the mechanical properties of the coating, nanoindentation is used in this work. Since the measurement results of nanoindentation can be affected by the substrate material, the contribution of the substrate material is taken into account utilizing a finite element model. The model is then employed to generate information about elastic and plastic properties of the coating by inverse simulation. To evaluate the fracture toughness of the coating, the generated material model is used in a cohesive-zone based formulation of the fracture process during indentation at higher loads. The results of this model allow determining the fracture toughness of silicon carbide coatings deposited at different temperatures.

Phase Formation and Mechanical Properties of Multiphase Carbide Coatings

1999 ◽  
Vol 594 ◽  
Author(s):  
J. E. Krzanowski ◽  
S. H. Koutzaki ◽  
J. Nainaparampil ◽  
J. S. Zabinski
Keyword(s):  
Mechanical Properties ◽  
Room Temperature ◽  
X Ray Diffraction ◽  
Tem Analysis ◽  
X Ray ◽  
Sapphire Substrates ◽  
Carbide Coatings ◽  
Ternary Carbide ◽  
Hardness Values ◽  
Mo Additions

AbstractWe have investigated nano-structured multiphase coatings consisting of mixed carbide components. Two ternary carbide systems, Ti-Mo-C and Ti-Si-C, were examined. Coatings were fabricated by co-sputtering from carbide targets, thereby allowing a complete range of film compositions to be obtained in each system. Films were deposited on Si and sapphire substrates at temperatures ranging from room temperature to 650°C. Film compositions were determined using XPS, and x-ray diffraction and TEM analysis were used to examine the films for texture, grain size, phase stability and the potential for creating nano-structured multiphase films. Mo was found to be soluble in TiC up to about 80% Mo, and between 85–95% Mo a multiphase structure was obtained. The hardness of these films generally did not improve due to the Mo additions. For the Ti-Si-C films, X-ray diffraction results were consistent with the formation of cubic SiC and TiC phases. In these films, the hardness was found to improve with SiC additions optimally giving hardness values of about twice that of TiC alone.

Structure and mechanical properties of boron carbide coatings formed by electromagnetically accelerated plasma spraying

2003 ◽  
Vol 12 (10-11) ◽  
pp. 1891-1896 ◽  
Author(s):  
J. Kitamura ◽  
S. Usuba ◽  
Y. Kakudate ◽  
H. Yokoi ◽  
K. Yamamoto ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Boron Carbide ◽  
Plasma Spraying ◽  
Carbide Coatings
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