Evaluation of Yttria Coated High Density Graphite with Silicon Carbide Interlayer for Uranium Melting Applications

2019 ◽  
Vol 45 (9) ◽  
pp. 11694-11702 ◽  
Author(s):  
B. Madhura ◽  
E. Vetrivendan ◽  
Ch. Jagadeeswara Rao ◽  
P. Venkatesh ◽  
S. Ningshen
Author(s):  
В.Д. Ерошенко ◽  
А.Н. Овчинников ◽  
А.Н. Васильев

Рассмотрен способ силицирования высокоплотного графита марки МПГ; показано, что процесс силицирования протекает на всю глубину заготовки и кремний равномерно распределяется по объему поры, при этом карбид кремния распределяется по поверхности, в то время как кремний остается в остальном объеме поры; исследованы физико-механические характеристики и фазовый состав графита после силицирования; показано, что такой силицированный графит возможно использовать в качестве нагревателей вакуумных печей, а также в химических источников тока. A method of siliconizing high-density graphite of the MPG grade is considered; it is shown that the siliconizing process proceeds to the entire depth of the workpiece and silicon is evenly distributed over the pore volume, while silicon carbide is distributed over the surface, while silicon remains in the rest of the pore volume; investigated the physical and mechanical characteristics and phase composition of graphite after siliconizing; it is shown that such siliconized graphite can be used as heaters for vacuum furnaces, as well as in chemical current sources.


1994 ◽  
Vol 349 ◽  
Author(s):  
Yang-Duk Park ◽  
Chul-Woo Kim ◽  
Young-Dae Seo

ABSTRACTPreparation of high density graphite materials from coal tar pitch was investigated. The effect of β-resin content on the mechanical properties of graphite solid prepared from semi-coke, which was prepared by wet milling method, was examined. β-Resin content was effective for fabrication of green bodies without lamination and for improving the mechanical properties of graphite materials.


2015 ◽  
Vol 41 (2) ◽  
pp. 3128-3136 ◽  
Author(s):  
Ch. Jagadeeswara Rao ◽  
A. Ravi Shankar ◽  
C. Mallika ◽  
U. Kamachi Mudali

Author(s):  
Zhongjing Wang ◽  
Yuheng Wu ◽  
Mohammad Hazzaz Mahmud ◽  
Zhe Zhao ◽  
Yue Zhao ◽  
...  
Keyword(s):  

1997 ◽  
Vol 36 (19) ◽  
pp. 4409 ◽  
Author(s):  
Ritva A. M. Keski-Kuha ◽  
Charles M. Fleetwood ◽  
Joseph Robichaud

2001 ◽  
Vol 34 (1) ◽  
pp. 20-26 ◽  
Author(s):  
W. M. Vetter ◽  
M. Dudley

Contrast is associated with micropipes in X-ray topographs of SiC crystals obtained with prismatic reflections, representing an apparent violation of theg·b= 0 invisibility criterion. This is explained as a population of basal-plane dislocations with Burgers vectors of the setb= {\textstyle{1 \over 3}}〈11{\bar{2}}0〉 that occur in a high density within a few micrometers of the micropipes, below the resolution of X-ray topography. These basal-plane dislocations could be observed under an electron microscope. The presence of the surfaces of the micropipes influences the dislocation images in the topographs taken with prismatic reflections, often resulting in a band of light contrast along the axes of the micropipes.


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