Influence of Surface Treatment on the Surface Energy of Tungsten Carbide Inserts

2014 ◽  
Vol 699 ◽  
pp. 38-43
Author(s):  
Md Nizam Abd Rahman ◽  
Mohd Fairuz Dimin ◽  
M.Z. Izani ◽  
M. Mazliah
Keyword(s):  
Surface Energy ◽  
Surface Treatment ◽  
Tungsten Carbide ◽  
Polar Component ◽  
Distilled Water ◽  
Cleaning Process ◽  
Methylene Iodide ◽  
Solvent Type ◽  
Carbide Inserts ◽  
Substrate Cleaning

The effect of substrate cleaning using ultrasonic cleaner on tungsten carbide was investigated. The surface energy of the substrate was measured using two liquids with dominant polar and dominant dispersion components which were distilled water (DI) and methylene iodide. Owens-Wendt method was carried out to calculate the surface energy of the substrate. The result showed that the cleaning process using solvent B (alkaline, DI, acid, DI, DI, alcohol) for 20 minutes without the wiping process led to the highest surface energy of 126.3399 dyne/cm with the polar component of 80.538 dyne/cm. Findings from this research suggested that type of solvent, cleaning time, and interactions among solvent type, cleaning time, and wiping process significantly influenced surface energy of the substrate.

Effect of Plasma Surface Treatment on Surface Energy and Adhesion Properties for Cr Coating on Substrates

2013 ◽  
Vol 51 (10) ◽  
pp. 735-741
Author(s):  
Dong-Yong Kim ◽  
Eun-Wook Jeong ◽  
Kwun Nam Hui ◽  
Youngson Choe ◽  
Jung-Ho Han ◽  
...  
Keyword(s):  
Surface Energy ◽  
Surface Treatment ◽  
Adhesion Properties ◽  
Plasma Surface ◽  
Plasma Surface Treatment ◽  
Cr Coating

A look into the interaction of metal oxide thin films with biological media: Albumin and Fibrinogen adsorption

2012 ◽  
Vol 1376 ◽  
Author(s):  
P. Silva-Bermudez ◽  
S. Muhl ◽  
M. Rivera ◽  
S. E. Rodil
Keyword(s):  
Surface Roughness ◽  
Surface Energy ◽  
Protein Adsorption ◽  
Photoelectron Spectroscopy ◽  
Ex Situ ◽  
Polar Component ◽  
Metal Oxide Thin Films ◽  
Adsorbed Protein ◽  
Major Chemical ◽  
Fibrinogen Adsorption

ABSTRACTIn the present work, the adsorption of albumin and fibrinogen on Ta, Nb, Ti and Zr oxidesthin films deposited on Si (100) wafers by magnetron sputtering was studied in order to get a better understanding of the correlation among the surface properties of these oxides and the protein adsorption phenomena on their surfaces. The surface energy, hydrophobicity, chemical composition, roughness and atomic order of the films were characterized. The films were immersedfor 45 minutes in single protein solutions; either albumin or fibrinogenand the adsorbed protein layer on the films was studied ex-situ in a dry ambient using bothX-ray photoelectron spectroscopy and atomic force microscopy.The adsorption of albumin and fibrinogen on the films modified the surface morphology and decreased the surface roughness for all the four different metal oxides. The XPS results confirmed the presence of the protein on the surface of the films and showed that the two proteins studied were adsorbed without undergoing a major chemical decomposition. A correlation between the surface roughness,the polar component of the surface energy of the films and the atomic percentage of nitrogen on the films after protein adsorption, an indirect signal of the amount of protein adsorbed, was found for albumin and fibrinogen adsorption on Ta, Nb and Ti oxides; the largest the roughness or the polar component the largest amount of adsorbed protein.

Wear behaviour of cryogenically treated tungsten carbide inserts under dry and wet turning conditions

2009 ◽  
Vol 49 (3-4) ◽  
pp. 256-260 ◽  
Author(s):  
Simranpreet Singh Gill ◽  
Rupinder Singh ◽  
Harpreet Singh ◽  
Jagdev Singh
Keyword(s):  
Tungsten Carbide ◽  
Wear Behaviour ◽  
Carbide Inserts

Effect of the Substrate Cleaning Process on Pinhole Formation in Sputtered CdTe Films

2017 ◽  
Vol 26 (8) ◽  
pp. 4020-4028 ◽  
Author(s):  
E. Camacho-Espinosa ◽  
A. I. Oliva-Avilés ◽  
A. I. Oliva
Keyword(s):  
Cleaning Process ◽  
Cdte Films ◽  
Substrate Cleaning

Surface Modification of Calcium Hydroxyfluor Carbonate Apatites by Bisphosphonates

2005 ◽  
Vol 284-286 ◽  
pp. 357-360 ◽  
Author(s):  
Luis M. Rodríguez-Lorenzo ◽  
Blanca Vázquez ◽  
Julio San Román
Keyword(s):  
Thermal Analysis ◽  
Contact Angle ◽  
Weight Loss ◽  
Surface Modification ◽  
Bone Resorption ◽  
Ir Spectroscopy ◽  
Surface Energy ◽  
Cellular Interaction ◽  
Polar Component ◽  
Carbonate Apatite

Hydroxyapatite has been frequently described as an osteoconductive but not osteoinductive material based on failure to observe bone formation in nonbony sites. Bisphosphonates (BPs) are stable pyrophosphate analogs, that enhance the proliferation, differentiation and bone forming activity of osteoblasts and are potent inhibitors of bone resorption. In this paper, the modification of a calcium hydroxyfluor carbonate apatite with sodium alendronate and (4-(aminomethyl)benzene)bisphosphonic acid is described. The surface modification is carried out by refluxing the apatite in a bisphosphonate acetone solution. Modified particles are characterized by thermal analysis, ATR-IR spectroscopy and contact angle between other techniques. A weight loss between 150 and 500°C can be observed for the modified apatites. IR spectra show the appearance of bisphosphonate bands on modified powders. The surface energy of the modified apatite is reduced up to a 74% from the total apatite value after the alendronate surface modification with a decrease of 58% of the polar component main responsible of the cellular interaction of biomaterials.

Investigation on wear behaviour of cryogenically treated TiAlN coated tungsten carbide inserts in turning

2011 ◽  
Vol 51 (1) ◽  
pp. 25-33 ◽  
Author(s):  
Simranpreet Singh Gill ◽  
Jagdev Singh ◽  
Harpreet Singh ◽  
Rupinder Singh
Keyword(s):  
Tungsten Carbide ◽  
Wear Behaviour ◽  
Carbide Inserts

scholarly journals Plasma Surface Treatment of Powder Materials — Process and Application

10.14311/1562 ◽  
2012 ◽  
Vol 52 (3) ◽  
Author(s):  
Monika Pavlatová ◽  
Marta Horáková ◽  
Jan Hladík ◽  
Petr Špatenka
Keyword(s):  
Surface Energy ◽  
Surface Treatment ◽  
Plasma Treatment ◽  
Surface Properties ◽  
Industrial Scale ◽  
Powder Materials ◽  
Environment Friendly ◽  
Plasma Surface ◽  
Plasma Surface Treatment

Polyolefin particles are hydrophobic, and this prevents their use for various applications. Plasma treatment is an environment-friendly polyolefin hydrophilisation method. We developed an industrial-scale plant for plasma treatment of particles as small as micrometers in diameter. Materials such as PE waxes, UHMWPE and powders for rotomolding production were tested to verify their new surface properties. We achieved significantly increased wettability of the particles, so that they are very easily dispersive in water without agglomeration, and their higher surface energy is retained even after sintering in the case of rotomolding powders.

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