Characterization of Oxide Film by Vanadium Based Anodic Oxidation Coating

2014 ◽  
Vol 970 ◽  
pp. 55-59
Author(s):  
Toha Nor Fadzilah ◽  
Siti Norbahiyah ◽  
Mohd Zain Mohamad Zamzuri
Keyword(s):  
Magnesium Alloy ◽  
Oxide Film ◽  
Cross Section ◽  
Corrosion Test ◽  
Energy Dispersive Spectrometry ◽  
Optical Microscope ◽  
Az91d Magnesium Alloy ◽  
Atomic Force ◽  
Polarization Technique

An oxide film was prepared on AZ91D magnesium alloy by anodizing in solution containing sodium metavanadate (NaVO3). The corrosion resistance of the AZ91D magnesium alloy was investigated at fixed current density 10 mA/cm2for 5 min with different concentration of solution in the range of 0 1.0 g/l. The surface morphology, cross section morphology, phase structure, and surface roughness of oxide film were studied by optical microscope, scanning electron microscope (SEM) and energy dispersive spectrometry (EDS), atomic force microscope (AFM) and potentiodynamic polarization technique and corrosion test, respectively.

Corrosion Resistance by Sodium Metavanadate for AZ91D Magnesium Alloy

2014 ◽  
Vol 575 ◽  
pp. 170-174 ◽  
Author(s):  
Toha Nor Fadzilah ◽  
S. Norbahiyah ◽  
Mohd Zain Mohamad Zamzuri
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Oxide Film ◽  
Corrosion Test ◽  
Energy Dispersive Spectrometry ◽  
Optical Microscope ◽  
X Ray ◽  
Sodium Metavanadate ◽  
Az91d Magnesium Alloy ◽  
Polarization Technique

An oxide film was prepared on AZ91D magnesium alloy by anodizing in solution containing sodium metavanadate (NaVO3). The corrosion resistance of the substrate was investigated at a fixed current density 10 mA/cm2for 5 mins with different concentration of solution in the range of 0 – 1.0 g/l. The surface morphology, phase structure and corrosion resistance of oxide film were studied by optical microscope, scanning electron microscope (SEM) and energy dispersive spectrometry (EDS) and X-ray diffractometer (XRD), potentiodynamic polarization technique and corrosion test.

Effect of Niobium Film on Corrosion Resistance of AZ91D Magnesium Alloy

2012 ◽  
Vol 525-526 ◽  
pp. 9-12 ◽  
Author(s):  
Er Bao Liu ◽  
Xiu Fang Cui ◽  
Guo Jin ◽  
Qing Fen Li ◽  
Tian Min Shao
Keyword(s):  
Corrosion Resistance ◽  
Elastic Modulus ◽  
Magnesium Alloy ◽  
Substrate Temperature ◽  
Phase Structure ◽  
Film Deposition ◽  
Negative Bias ◽  
Az91d Magnesium Alloy ◽  
Atomic Force ◽  
Deposition Parameters

The niobium film is prepared by magnetron sputtering on the surface of the AZ91D magnesium alloy. The morphology, phase structure, roughness, nanohardness and elastic modulus of the niobium films were studied by filed emission scanning electron microscope, X-ray diffraction, atomic force microscope and nanoindentation respectively. The influences of film deposition parameters, such as substrate temperature, negative bias and power on the properties of films were investigated. The corrosion resistance of niobium films on magnesium alloy was investigated by electrochemical system. Results show that the microstructure, phase structure, roughness, nanohardness and elastic modulus of the niobium films are determined by power, negative bias and substrate temperature. And the corrosion resistance of magnesium alloy improved obviously when coated with the niobium films.

Preparation and characterization of colored Ti/Zr conversion coating on AZ91D magnesium alloy

2015 ◽  
Vol 276 ◽  
pp. 239-247 ◽  
Author(s):  
Aihua Yi ◽  
Jun Du ◽  
Jian Wang ◽  
Songling Mu ◽  
Guoge Zhang ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Conversion Coating ◽  
Az91d Magnesium Alloy

Preparation and characterization of inorganic and organic coatings on AZ91D magnesium alloy with electroless plating pretreatment

2011 ◽  
Vol 62 (9) ◽  
pp. 841-847 ◽  
Author(s):  
S. Y. Zhang ◽  
Q. Li ◽  
X. K. Yang ◽  
H. X. Zhang ◽  
S. Y. Wang ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Electroless Plating ◽  
Organic Coatings ◽  
Az91d Magnesium Alloy ◽  
Inorganic And Organic

Research on Forming Process of Anodic Oxide Film of AZ91D Magnesium Alloy

2012 ◽  
Vol 476-478 ◽  
pp. 34-37
Author(s):  
Xiao Chun Ma ◽  
Jian Cheng Hu ◽  
Ying Qi Tao
Keyword(s):  
Magnesium Alloy ◽  
Oxide Film ◽  
Anodic Oxide ◽  
Anodic Oxide Film ◽  
Protective Film ◽  
Forming Process ◽  
Az91d Magnesium Alloy ◽  
The Matrix ◽  
Optimal Surface ◽  
Anodic Oxidation Treatment

The matrix of AZ91D Magnesium alloy can be covered with a coat of protective film through anodic oxidation treatment, it’s able to make certain that the optimal surface combination properties are generated especially on corrosion resistance. This thesis is devoted to the research on forming process of anodic oxide film of AZ91D magnesium alloy; the experiment shows the formation of anodic oxide film at constant pressure is accompanied by precipitation of gases and fluctuation of current, XRD indicates that anodic oxide film is composed of MgO、γ-Al2O3 and a small amount of Si.

Preparation and Characterization of SiC Coating on Graphite Substrate

2014 ◽  
Vol 602-603 ◽  
pp. 412-415 ◽  
Author(s):  
Yan Li Huo ◽  
Shu Guang Chen ◽  
Hai Long Liang ◽  
Chun Peng Wang ◽  
Jian Zhou ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Cross Section ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Optical Microscope ◽  
Chemical Vapor Infiltration ◽  
Good Combination ◽  
Graphite Substrate

High thermal conductivity and dense SiC coating were fabricated by chemical vapor deposition (CVD) on surface of different graphite at temperature of 1100°C. The results indicated that the thickness of the coating influences the quality of coating. There was no crack in coating when thickness of the coating is less than 0.3mm. The structure of graphite affected the reaction badly. When the graphite is coarse and porous the reaction is chemical vapor infiltration (CVI) and the interface of coating and substrate isnt obvious. When the graphite is dense and smooth, the coating is covered in surface of graphite, the interface is found between the coating and substrate. Optical microscope and SEM were used to observe the surface and cross-section morphology and microstructure of coatings. It shown coating and substrate had a good combination and the deposited grains mainly showed equiaxed form with the crystallite size of 30 nm at 1100°C.

Effect of yttrium addition and the powder size on oxide film and powder ignition temperature of AZ91D magnesium alloy

2009 ◽  
Vol 481 (1-2) ◽  
pp. 373-378 ◽  
Author(s):  
Peng-yu Lin ◽  
Hong Zhou ◽  
Wen-ping Li ◽  
Ming-xing Wang ◽  
Qing-chun Guo ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Oxide Film ◽  
Ignition Temperature ◽  
Powder Size ◽  
Az91d Magnesium Alloy ◽  
Yttrium Addition

Nanomechanical characterization of porous materials by atomic force microscopy

MRS Advances ◽  
2018 ◽  
Vol 3 (44) ◽  
pp. 2719-2724
Author(s):  
D.L.P. Lacerda ◽  
F. Ptak ◽  
R. Prioli
Keyword(s):  
Electron Microscopy ◽  
Atomic Force Microscopy ◽  
Cross Section ◽  
Elastic Moduli ◽  
Wide Distribution ◽  
Acoustic Microscopy ◽  
Force Microscopy ◽  
Atomic Force ◽  
Scanning Electron

AbstractAtomic force microscopy (AFM) and nanoindentation were used to characterize poly (methyl methacrylate) (PMMA) films with a wide distribution of pores. Pores with diameters ranging from tens of nanometers to few micrometers were measured by AFM and cross-section scanning electron microscopy (SEM). Atomic force acoustic microscopy (AFAM) mapping of the elastic modulus were correlated with the samples topography and pore distribution. The elastic moduli of the samples were additionally measured by nanoindentation.

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