High-Temperature Oxidation Resistance and Thermal Stability of Higher Manganese Silicide Powder Synthesized by Pack Cementation

Purpose This paper aims to discuss that a WC/Co-Cr alloy coating was applied to the surface of H13 steel by laser cladding. Design/methodology/approach The oxidation behavior of the WC/Co-Cr alloy coating at 600Â°C was investigated by comparing it with the performance of the steel substrate to better understand the thermal stability of H13 steel. Findings The results showed that the WC/Co-Cr alloy coating exhibited better high-temperature oxidation resistance and thermal stability than did uncoated H13 steel. The coated H13 steel had a lower mass gain rate and higher microhardness than did the substrate after different oxidation times. Originality/value The WC/Co-Cr alloy coating was composed of e-Co, CW3, Co6W6C, Cr23C6 and Cr7C3; this mixture offered good thermal stability and better high-temperature oxidation resistance.

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Synthesis of Al-Ni coatings by pack cementation and examination of their high temperature oxidation resistance

10.1063/1.5091355 ◽

2019 ◽

Author(s):

Kourtidou Dimitra ◽

Chaliampalias Dimitrios ◽

Teknetzi Aikaterini ◽

Karfaridis Dimitrios ◽

Tarani Evangelia ◽

...

Keyword(s):

High Temperature ◽

Oxidation Resistance ◽

High Temperature Oxidation ◽

Pack Cementation ◽

Temperature Oxidation

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Effect of Al, Si, and Cr on the thermal stability and high-temperature oxidation resistance of coatings based on titanium boronitride

The Physics of Metals and Metallography ◽

10.1134/s0031918x07080091 ◽

2007 ◽

Vol 104 (2) ◽

pp. 167-174 ◽

Cited By ~ 11

Author(s):

F. V. Kiryukhantsev-Korneev ◽

M. I. Petrzhik ◽

A. N. Sheveiko ◽

E. A. Levashov ◽

D. V. Shtanskii

Keyword(s):

Thermal Stability ◽

High Temperature ◽

Oxidation Resistance ◽

High Temperature Oxidation ◽

Temperature Oxidation

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SiC/SiO2 Coating on Matrix Graphite Spheres of HTR Fuel Element Produced by a Two-Step Pack Cementation/High-Temperature Oxidation Process

Materials Science Forum ◽

10.4028/www.scientific.net/msf.852.952 ◽

2016 ◽

Vol 852 ◽

pp. 952-958 ◽

Cited By ~ 1

Author(s):

Ping Zhou ◽

Zi Qiang Li ◽

Hong Sheng Zhao ◽

Kai Hong Zhang ◽

Xiao Xue Liu ◽

...

Keyword(s):

High Temperature ◽

Oxidation Resistance ◽

High Temperature Oxidation ◽

Oxidation Process ◽

Reactor Core ◽

Isothermal Oxidation ◽

Pack Cementation ◽

Temperature Oxidation ◽

Matrix Graphite ◽

Fuel Elements

Graphite is one of the most important material for the reactor core and fuel elements of high temperature gas-cooled reactor (HTR). Improving the oxidation resistance of graphite is very essential for the research of new fuel elements and the development of HTR. In this study, a gradient SiC layer of 500~700 μm was prepared on matrix graphite spheres by a two-step pack cementation, and the outer SiO2 layer prepared by the high-temperature oxidation process. The phases, microstructure, bonding strength and oxidation resistance of SiC/SiO2 coated matrix graphite spheres were investigated. The SiC/SiO2 coated matrix graphite spheres were carried on rapid thermal shocking tests from 1773 K to room temperature for 50 times without any cracks. The SiC/SiO2 coated matrix graphite spheres exhibits excellent anti-oxidation properties. No obvious weight loss was found after isothermal oxidation in air at 1273 K for 50 h and the weight gain was less than 1% at 1773 K in air for 50 h due to the oxidation of SiC layer.

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