Deposition and microstructure characterization of atmospheric plasma-sprayed ZnO coatings for NO2 detection

2010 ◽  
Vol 256 (20) ◽  
pp. 5905-5910 ◽  
Author(s):  
Chao Zhang ◽  
Marc Debliquy ◽  
Hanlin Liao
Keyword(s):  
Microstructure Characterization ◽  
Atmospheric Plasma ◽  
Plasma Sprayed ◽  
No2 Detection

Characterization of atmospheric plasma-sprayed Sc2O3–ZrO2 electrolyte coating

2006 ◽  
Vol 177 (19-25) ◽  
pp. 2149-2153 ◽  
Author(s):  
C LI ◽  
C LI ◽  
H LONG ◽  
Y XING ◽  
X NING ◽  
...  
Keyword(s):  
Atmospheric Plasma ◽  
Plasma Sprayed

Characterization of Al2O3 and SiC Particles, Reinforced Al Powders, and Plasma Sprayed Wear Resistance Coatings

2000 ◽  
Author(s):  
Fr.-W. Bach ◽  
T. Duda ◽  
Z. Babiak ◽  
P. Bohling ◽  
B. Formanek
Keyword(s):  
Wear Resistance ◽  
Atmospheric Plasma ◽  
Mechanically Alloyed ◽  
Aluminum Coatings ◽  
Hard Particles ◽  
Sic Particles ◽  
Plasma Sprayed ◽  
Aluminum Substrates ◽  
Wear Resistance Coatings

Abstract Aluminum coatings reinforced with either Al2O3 or SiC particles were deposited onto aluminum substrates and subjected to various tests. The coatings were made with mechanically alloyed powders via atmospheric plasma spraying (APS). Both types of coatings had uniformly distributed hard particles, porosities in the range of 4 to 5%, and bond strengths of around 20 MPa. The wear resistance of the SiC-reinforced coatings, however, was almost 35% higher than the coatings containing Al2O3. X-ray examination (XRD) showed that the Al2O3 particles undergo partial phase transformation during spraying, making them more prone to wear.

Sensing properties of atmospheric plasma-sprayed WO3 coating for sub-ppm NO2 detection

2010 ◽  
Vol 144 (1) ◽  
pp. 280-288 ◽  
Author(s):  
Chao Zhang ◽  
Marc Debliquy ◽  
Abdelhamid Boudiba ◽  
Hanlin Liao ◽  
Christian Coddet
Keyword(s):  
Atmospheric Plasma ◽  
Sensing Properties ◽  
Plasma Sprayed ◽  
No2 Detection

scholarly journals Microstructure and Wear Behaviors of Plasma-Sprayed MoAlB Ceramic Coating

Coatings ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 474
Author(s):  
Fuzhu Li ◽  
Shengnan Sun ◽  
Yong Xu ◽  
Lihui Tian ◽  
Yun Wang ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Plasma Spraying ◽  
Ceramic Coating ◽  
Adhesive Wear ◽  
Ceramic Coatings ◽  
Atmospheric Plasma ◽  
Wear Rates ◽  
Arc Power ◽  
Plasma Sprayed

MoAlB ceramic coatings were prepared on a 316 steel surface by atmospheric plasma spraying with different arc power levels. The phase composition, microstructure and wear resistance of coatings against GCr15 and Si3N4 counterparts were studied. The MoAlB ceramic decomposed and was oxidized to form MoB and Al2O3 during plasma spraying. With the increase of the arc power, MoAlB experienced more decomposition, but the coatings became denser. When the arc power increased from 30 to 36 kW, the wear rates of coatings against GCr15 and Si3N4 balls reduced by 91% and 78%, respectively. The characterization of wear tracks shows that when against GCr15 counterparts, the main wear mechanisms are abrasive and adhesive wear, and when against Si3N4 counterparts, fatigue and abrasive wear are dominant. The refinement of wear resistance by increasing arc power can be attributed to the improvement of density and adhesive strength among splats.

Characterization of atmospheric plasma-sprayed La0.8Sr0.2Ga0.8Mg0.2O3 electrolyte

2008 ◽  
Vol 184 (2) ◽  
pp. 370-374 ◽  
Author(s):  
Cheng-Xin Li ◽  
Ying-Xin Xie ◽  
Chang-Jiu Li ◽  
Guan-Jun Yang
Keyword(s):  
Atmospheric Plasma ◽  
Plasma Sprayed

Microstructural and Mechanical Characterization of Mechanically-Activated Plasma-Sprayed Nanostructured Al2O3-TiO2 and Al2O3-ZrO2 Coatings

2006 ◽  
Vol 45 ◽  
pp. 1224-1229
Author(s):  
Sandrine Coste ◽  
Ghislaine Bertrand ◽  
Christian Coddet ◽  
Eric Gaffet ◽  
Horst Hahn ◽  
...  
Keyword(s):  
Plasma Spraying ◽  
Gas Flow ◽  
Structural Changes ◽  
Mechanical Characterization ◽  
Raw Materials ◽  
Phase Changes ◽  
Atmospheric Plasma ◽  
Plasma Sprayed ◽  
Zirconia Powders

Granulated nanostructured alumina/titania and alumina/zirconia powders were used to achieve coatings by atmospheric plasma spraying. Raw materials and mechanically activated ceramic mixtures (alumina with 13wt% and 44wt% of titania or 40wt% and 80wt% of zirconia) have been considered to produce the sprayable powders. Effects of various plasma spray conditions (primary Ar and secondary H2 gas flow rates, arc intensity) on the microstructure, phase content and microhardness of the coatings have been evaluated. It has been shown by SEM observations that the coatings exhibit a lamellar structure consisting in fully melted and partially melted areas including porosity, ranging from 10 to 30vol.%. The phase changes (from αAl2O3 to γAl2O3, from anatase to rutile for TiO2, Al2TiO5) or structural changes that occur during the plasma spraying of the nanostructured powders were investigated by XRD and related to the processing conditions and in turn to the amount of unmelted powder.

CHARACTERIZATION OF AS-SPRAYED AND LASER-TREATED ZIRCONIA-BASED PLASMA SPRAYED COATINGS

1990 ◽  
Vol 51 (C5) ◽  
pp. C5-393-C5-402
Author(s):  
A. FERRIERE ◽  
G. FLAMANT ◽  
J.-F. ROBERT ◽  
P. PEKSHEV ◽  
I. SMUROV ◽  
...  
Keyword(s):  
Plasma Sprayed Coatings ◽  
Plasma Sprayed ◽  
Sprayed Coatings

scholarly journals Microstructural Charactistics of Plasma Sprayed NiCrBSi Coatings and Their Wear and Corrosion Behaviors

Coatings ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 170
Author(s):  
Songqiang Huang ◽  
Jingzhong Zhou ◽  
Kuoteng Sun ◽  
Hailiang Yang ◽  
Weichen Cai ◽  
...  
Keyword(s):  
Laser Scanning ◽  
Acid Corrosion ◽  
Composite Coatings ◽  
Atmospheric Plasma ◽  
Confocal Laser ◽  
Formation Mechanisms ◽  
Temperature Oxidation ◽  
Surface Protection ◽  
Plasma Sprayed ◽  
Nicrbsi Coatings

Nickel-based alloys are commonly used as protective coating materials for surface protection applications owing to their superior resistance to corrosion, wear and high-temperature oxidation. It is urgent to study the fundamental mechanism between the structure and corrosion properties of the Nickel-base composite coatings. This paper, therefore, focuses on clarifying the mechanisms of the microstructure influencing the acid corrosion and mechanical characteristics of the as-sprayed NiCrBSi coating and post-heat-treated coating. The formation mechanisms of the amorphous phase of flat particles during the plasma spray process were studied by using X-ray diffraction analysis, Raman spectroscopy and confocal laser scanning microscope at first. Then the evolutionary process of the corrosion structure and phase of the coating in the accelerated corrosion experiment is directly visualized by using scanning electron microscopy and energy spectrum analysis. The mechanical properties of the amorphous NiCrBSi coatings are lastly measured by microhardness and friction wear tests. The critical phenomena and results help to elucidate the relative influence of the surface features of atmospheric plasma sprayed coatings on acid corrosion responses and wear resistance, aiming at contributing to the development of a protective technique for electrical engineering.

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