scholarly journals Al-WC composite coating on AZ91D Mg alloy by low power pulsed laser cladding

2020 ◽  
Vol 58 (03) ◽  
pp. 169-179
Author(s):  
Y. Q. Zhang ◽  
Z. Y. Li ◽  
S. Y. Liu ◽  
S. Z. Wei
Keyword(s):  
Low Power ◽  
Composite Coating ◽  
Laser Cladding ◽  
Pulsed Laser ◽  
Mg Alloy

Al-TiC in situ composite coating fabricated by low power pulsed laser cladding on AZ91D magnesium alloy

2018 ◽  
Vol 435 ◽  
pp. 1187-1198 ◽  
Author(s):  
Liuqing Yang ◽  
Zhiyong Li ◽  
Yingqiao Zhang ◽  
Shouzheng Wei ◽  
Fuqiang Liu
Keyword(s):  
Magnesium Alloy ◽  
Low Power ◽  
Composite Coating ◽  
Laser Cladding ◽  
Pulsed Laser ◽  
In Situ Composite ◽  
Az91d Magnesium Alloy

Microstructure of SiC/Al composite coating by CO2 laser cladding

2004 ◽  
Author(s):  
Yang Xi-Chen ◽  
Li Hui-Shan ◽  
Wang Yun-Shan ◽  
Ma Bing ◽  
Yi Ying-Hui
Keyword(s):  
Composite Coating ◽  
Laser Cladding ◽  
Co2 Laser ◽  
Al Composite

Laser Cladding of Hard TiO xN y/Ti Composite Coating on Ti Alloy

2020 ◽  
Author(s):  
Yitian Zhao ◽  
Mingyuan Lu ◽  
Zhiqi Fan ◽  
Qiyang Tan ◽  
Han Huang
Keyword(s):  
Composite Coating ◽  
Laser Cladding ◽  
Ti Alloy

scholarly journals Isothermal Oxidation Performance of Laser Cladding Assisted with Preheat (LCAP) Tribaloy T-800 Composite Coatings Deposited on EN8

Coatings ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 843
Author(s):  
Sipiwe Trinity Nyadongo ◽  
Sisa Lesley Pityana ◽  
Eyitayo Olatunde Olakanmi
Keyword(s):  
Iron Oxide ◽  
Composite Coating ◽  
Laser Cladding ◽  
Composite Coatings ◽  
Parabolic Rate Constant ◽  
Mass Gain ◽  
Isothermal Oxidation ◽  
Operational Parameters ◽  
Temperature Oxidation ◽  
Service Environments

It is anticipated that laser cladding assisted with preheat (LCAP)-deposited Tribaloy (T-800) composite coatings enhances resistance to structural degradation upon exposure to elevated-temperature oxidation service environments. The oxidation kinetics of LCAP T-800 composite coatings deposited on EN8 substrate and its mechanisms have not been explored in severe conditions that are similar to operational parameters. The isothermal oxidation behaviour of the T-800 composite coating deposited on EN8 via LCAP was studied at 800 °C in air for up to 120 h (5 × 24 h cycles) and contrasted to that of uncoated samples. The mass gain per unit area of the coating was eight times less than that of the uncoated EN8 substrate. The parabolic rate constant (Kp) for EN8 was 6.72 × 10−12 g2·cm−4·s−1, whilst that for the T-800 composite coating was 8.1 × 10−13 g2·cm−4·s−1. This was attributed to a stable chromium oxide (Cr2O3) layer that formed on the coating surface, thereby preventing further oxidation, whilst the iron oxide film that formed on the EN8 substrate allowed the permeation of the oxygen ions into the oxide. The iron oxide (Fe2O3) film that developed on EN8 spalled, as evidenced by the cracking of oxide when the oxidation time was greater than 72 h, whilst the Cr2O3 film maintained its integrity up to 120 h. A parabolic law was observed by the T-800 composite coating, whilst a paralinear law was reported for EN8 at 800 °C up to 120 h. This coating can be used in turbine parts where temperatures are <800 °C.

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