SiC/Si - MoSi2 /MoSi2 Oxidation Protective Coating for Carbon Material at 1700°C

2010 ◽  
Vol 160-162 ◽  
pp. 1-6 ◽  
Author(s):  
Ju An Zhao
Keyword(s):  
Oxidation Resistance ◽  
Thermal Shock Resistance ◽  
Graphite Substrate ◽  
Good Oxidation Resistance ◽  
Functionally Gradient ◽  
Mosi2 Coating ◽  
Shock Resistance ◽  
Resistance Performance ◽  
Sintering Method ◽  
Layer Coating

A multi-layer coating SiC/ Si - MoSi2 /MoSi2 with good oxidation resistance has been developed by using the slurry-sintering method on the surface of graphite to improve the oxidation resistance performance at 1700 °C for more than 200 h. Microstructure and anti-oxidation property of the as-received coating were investigated. It was found that functionally gradient SiC/ Si - MoSi2 /MoSi2 coating was formed on the surface of the graphite substrate. The coating characterized by excellent thermal shock resistance can effectively protect the graphite from oxidation at 1700 °C for 200 h. The mechanism of the oxidation resistance of the coated graphite is also dicussed, and a dense SiO2 layer was formed on the surface of coating at 1700°C during the isotheral oxidation, which can protect graphite from oxidation at longer time.

The Research about Oxidation Kinetics of Ti60 Alloy and Ni-Co-Cr-Al-Y-Si Coating on Surface

2011 ◽  
Vol 189-193 ◽  
pp. 743-746
Author(s):  
Jian Feng Li ◽  
Li Zhi Guo ◽  
Guo Qing Li
Keyword(s):  
Oxidation Resistance ◽  
X Ray Diffraction ◽  
Surface Appearance ◽  
X Ray ◽  
Good Oxidation Resistance ◽  
Ion Plating ◽  
Alloy Oxidation ◽  
Resistance Performance ◽  
Kinetics Of ◽  
Electronic Microscope

This article summarized depositing craft of the superficial coatings (Ni-Co-Cr-Al-Y-Si) on the Ti60 alloy (Ti-6.5Al-4.2Sn-4Zr-0.6Si) with arc ion plating technology and the oxidation behavior under 600~750 . The X-ray diffraction (XRD) and the scanning electronic microscope (SEM) were used to analyze the surface appearance, the structure and the ingredient conducts of non-coating Ti60 alloy. The contrast shows that the coatings have good protection to Ti60 alloy. The result indicated that the coating has the good oxidation resistance performance under 600°C , 650°C and 750°C . Coated Ti60 alloy oxidation resistance is markly improved. The circulation oxidation dynamics curve basically conforms to the parabola rule.

Effects of pore diameters on phase, oxidation resistance, and thermal shock resistance of the porous Si2 N2 O ceramics

2017 ◽  
Vol 100 (5) ◽  
pp. 2190-2198 ◽  
Author(s):  
Shaojie Lin ◽  
Feng Ye ◽  
Junjie Ding ◽  
Chunping Yang ◽  
Jie Ma ◽  
...  
Keyword(s):  
Thermal Shock ◽  
Oxidation Resistance ◽  
Thermal Shock Resistance ◽  
Phase Oxidation ◽  
Shock Resistance

Thermal shock resistance of functionally gradient solid cylinders

2006 ◽  
Vol 418 (1-2) ◽  
pp. 99-110 ◽  
Author(s):  
Jun Zhao ◽  
Xing Ai ◽  
Yanzheng Li ◽  
Yonghui Zhou
Keyword(s):  
Thermal Shock ◽  
Thermal Shock Resistance ◽  
Functionally Gradient ◽  
Shock Resistance

Preparation and Oxidation Behavior of Metallic Nickel Containing MgAlON Composite

2018 ◽  
Vol 37 (6) ◽  
pp. 563-569
Author(s):  
Yang Jinlin ◽  
Xiao Hanxin
Keyword(s):  
Thermal Shock ◽  
Oxidation Resistance ◽  
Thermal Shock Resistance ◽  
Oxidation Reaction ◽  
Oxidation Behavior ◽  
Raw Materials ◽  
Metallic Nickel ◽  
Aluminum Oxynitride ◽  
Shock Resistance ◽  
Lower Temperature

AbstractTo survey the probability of the re-utilization of nickel containing slag corroded magnesia and alumina-graphite refractories, different amounts of nickel oxide (NiO) were used as one of raw materials to synthesize nickel containing magnesium aluminum oxynitride (MgAlON) composites, and the sintering and oxidation behavior have been explored in this work. The results reveal that with the increasing NiO additive, submicron metallic Ni grains are segregated from the (Ni,Mg)AlON spinel, and these grains are beneficial to improve thermal shock resistance of MgAlON. Though the oxidation reaction of (Ni,Mg)AlON starts at lower temperature than MgAlON, the metallic Ni grains in the plate can improve the oxidation resistance. Hence, the metallic nickel containing (Ni,Mg)AlON composite has not only superior thermal shock resistance but also excellent oxidation resistance, and it is of great potential to utilize in plant. So, the fabrication of metallic nickel containing (Ni,Mg)AlON composite should be a feasible way to reuse the nickel slag corroded magnesia and alumina graphite refractories.

Microstructures, Thermal Shock Resistance and Isothermal Oxidation Resistance of Nanostructured Ceria Stabilized Zirconia Coatings

2011 ◽  
Vol 189-193 ◽  
pp. 160-164
Author(s):  
Wen Quan Wang ◽  
Wen Biao Gong ◽  
Da Qian Sun
Keyword(s):  
Thermal Shock ◽  
Oxidation Resistance ◽  
Thermal Shock Resistance ◽  
Isothermal Oxidation ◽  
Stabilized Zirconia ◽  
Grain Structures ◽  
Nanostructured Ceria ◽  
Shock Resistance ◽  
Columnar Grain ◽  
Plasma Sprayed

Microstructures, thermal shock resistance and isothermal oxidation resistance of plasma-sprayed nanostructured ceria stabilized zirconia (CSZ) coatings were investigated. The results revealed that the nanostructured CSZ coatings mainly included two kinds of typical microstructures, nanosized CSZ particles embedded in the so-called matrix and micrometer-sized columnar grain structures of CSZ similar to those of the conventional coatings. Compared with the conventional CSZ coatings, the nanostructured CSZ coatings were denser and had finer and fewer porous structures and microcracks. Further study showed that the nanostructured CSZ coatings had higher thermal shock resistance and isothermal oxidation resistance compared with conventional CSZ coatings. The improved properties of the nanostructured CSZ coatings were attributed to the better coating toughness and decreased porosities and microcracks in the coatings.

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