Microstructure and Mechanical and Oxidation Properties of Multilayer Aluminide Coatings Formed Over P91 Steel

2022 ◽  
Author(s):  
Shubham Kumar ◽  
Bhaskar Paul ◽  
Jugal Kishor ◽  
Sanjib Majumdar ◽  
Vivekanand Kain
Keyword(s):  
P91 Steel ◽  
Aluminide Coatings ◽  
Oxidation Properties

scholarly journals Polyhedral oligomeric silsesquioxane (POSS)-modified phenolic resin: Synthesis and anti-oxidation properties

e-Polymers ◽  
2021 ◽  
Vol 21 (1) ◽  
pp. 316-326
Author(s):  
Bing Wang ◽  
Minxian Shi ◽  
Jie Ding ◽  
Zhixiong Huang
Keyword(s):  
Phenolic Resin ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Synthesis Process ◽  
H Nmr ◽  
Chemical Structures ◽  
Carbon Fiber Fabric ◽  
Oxidation Properties ◽  
Tg And Dtg ◽  
Oligomeric Silsesquioxane ◽  
Fiber Fabric

Abstract In this work, octamercapto polyhedral oligomeric silsesquioxane (POSS-8SH) and octaphenol polyhedral oligomeric silsesquioxane (POSS-8Phenol) were successfully synthetized. POSS-8Phenol was added into the synthesis process of liquid thermoset phenolic resin (PR) to obtain POSS-modified phenolic resin (POSS-PR). Chemical structures of POSS-8SH, POSS-8Phenol, and POSS-PR were confirmed by FTIR and 1H-NMR. TG and DTG analysis under different atmosphere showed that char yield of POSS-PR at 1,000°C increased from 58.6% to 65.2% in N2, which in air increased from 2.3% to 26.9% at 700°C. The maximum pyrolysis temperature in air increased from 543°C to 680°C, which meant better anti-oxidation properties. XRD results confirmed both POSS-8Phenol and POSS-PR-generated crystalline SiO2 in air, which could explain the improvement of anti-oxidation properties. SEM showed that the POSS-PR had phase separation during curing process. Finally, carbon fiber fabric-reinforced POSS-PR (C-POSS-PR) was prepared to verify the anti-oxidation properties of POSS-PR.

Aluminum particles with nano-size defects in their alumina shells and their thermal oxidation properties

2021 ◽  
pp. 159877
Author(s):  
Weiqiang Tang ◽  
Rongjie Yang ◽  
Jinghui Hu ◽  
Jianmin Li ◽  
Fei Xiao ◽  
...  
Keyword(s):  
Thermal Oxidation ◽  
Aluminum Particles ◽  
Oxidation Properties ◽  
Nano Size

The surface restructuring of copper oxides with mixed oxidation-states and their efficient CO oxidation properties

2021 ◽  
Vol 289 ◽  
pp. 129378
Author(s):  
Wei Liu ◽  
Baoqin Wang ◽  
Chenchen Cui ◽  
Yiwen Zhang ◽  
Lixuan Wang ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Copper Oxides ◽  
Oxidation States ◽  
Surface Restructuring ◽  
Mixed Oxidation ◽  
Oxidation Properties

An inverse method for determination of the interdiffusivity in aluminide coatings formed on superalloy

2004 ◽  
Vol 182 (1) ◽  
pp. 112-116 ◽  
Author(s):  
Hua Wei ◽  
Xiaofeng Sun ◽  
Qi Zheng ◽  
Guichen Hou ◽  
Hengrong Guan ◽  
...  
Keyword(s):  
Inverse Method ◽  
Aluminide Coatings

Study of the Role of Small Additions of Zr in the CVD- FBR Aluminization Process

2009 ◽  
Vol 289-292 ◽  
pp. 293-300
Author(s):  
L. Sánchez ◽  
F.J. Bolívar ◽  
M.P. Hierro ◽  
F.J. Pérez
Keyword(s):  
Fluidized Bed ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Fluidized Bed Reactor ◽  
Iron Aluminide ◽  
Martensitic Steels ◽  
Aluminide Coatings ◽  
Deposition Parameters ◽  
Zirconium Powder

In this work, iron aluminide coatings were developed by Chemical Vapor Deposition in Fluidized Bed Reactor (CVD-FBR) on ferritic-martensitic steels. Small additions of zirconium powder were introduced in the fluidized bed; as a consequence, the obtained coatings are thicker than that without zirconium additions. When Zr powders are added in the fluidized bed, the deposition atmosphere drastically changes, leading to increase the deposition rate. Thermodynamic calculations were carried out to simulate the modifications in the CVD atmosphere in the Al/Zr deposition system in comparison to the single aluminization. In order to optimize the conditions of the deposition, parameters such as temperature and concentration of zirconium introduced into the bed were evaluated and compared with the results obtained for the single aluminum deposition.

Effects of Polymer Supporters and Structures of Polymer-Bound-2, 2′-Bipyridine-Copper(II) Complexes on the Catalytic Oxidation Properties

1999 ◽  
Vol 38 (1) ◽  
pp. 159-165
Author(s):  
Ziqiang Lei ◽  
Xiangen Han ◽  
Yan Zhang ◽  
Rongmin Wang ◽  
Yonghong Cao ◽  
...  
Keyword(s):  
Catalytic Oxidation ◽  
Oxidation Properties

Effect of substrate alloy composition on the oxidation behaviour and degradation of aluminide coatings on two Ni base superalloys

2020 ◽  
Vol 167 ◽  
pp. 108494 ◽  
Author(s):  
W. Leng ◽  
R. Pillai ◽  
D. Naumenko ◽  
T. Galiullin ◽  
W.J. Quadakkers
Keyword(s):  
Alloy Composition ◽  
Oxidation Behaviour ◽  
Aluminide Coatings ◽  
Substrate Alloy
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