Fabrication and Mechanical Properties of Al2O3/5 Vol% Ni Composite by a Powder Coating Technique

2002 ◽  
Vol 224-226 ◽  
pp. 331-336
Author(s):  
Guo Jun Li ◽  
Xiao Wei Huang ◽  
Xiao Xian Huang ◽  
Jing Kun Guo
Keyword(s):  
Mechanical Properties ◽  
Powder Coating ◽  
Coating Technique

scholarly journals Interface Exploring of Tungsten Carbide-Stainless Steel Composites through HRTEM

2012 ◽  
Vol 18 (S5) ◽  
pp. 109-110 ◽  
Author(s):  
C. M. Fernandes ◽  
M.-G. Willinger ◽  
M. T. Vieira ◽  
A. M. R. Senos
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Stainless Steel ◽  
Structural Analysis ◽  
Mechanical Strength ◽  
Tungsten Carbide ◽  
Grain Boundaries ◽  
Powder Coating ◽  
Vacuum Sintering ◽  
Coating Technique

Composites of tungsten carbide (WC) and stainless steel (SS) have been produced through an innovative powder coating technique using sputtering. These composites showed remarkable mechanical properties after vacuum sintering, in spite of significant amounts of brittle eta-phase, (M,W)6C. The formation of eta-phase is almost inevitable, because it is thermodynamically favoured for stoichiometric C in the WC-SS system and accelerated in the SS coated WC particles, due to the reduced diffusion distances between WC and SS and the nanocrystalline character of the metallic coating. Surprisingly, the mechanical properties are not seriously affected by the eta-phase. In fact, relatively tough and harder materials have been obtained compared to similar compositions of WC-Co. In order to understand the microscopic reason for the reported mechanical strength, in-depth structural analysis of grain boundaries and interfaces was performed by electron microscopy.

Study of rheological behaviours of electrostatic thermoset powder coatings

e-Polymers ◽  
2009 ◽  
Vol 9 (1) ◽  
Author(s):  
Morteza Ehsani ◽  
Ali Akbar Yousefi ◽  
Saeed Samiei Yeganeh
Keyword(s):  
Mechanical Properties ◽  
Dynamic Viscosity ◽  
Physical And Mechanical Properties ◽  
Powder Coating ◽  
Curing Temperature ◽  
Design Parameters ◽  
Powder Coatings ◽  
Gel Time ◽  
Rheological Measurements ◽  
The Impact

AbstractThe use of dynamic viscosity/time (temperature) cure curves is seen as a powerful technique to quantify formulation and resin design parameters. The behaviour of different thermoset powder coating systems, epoxy/polyester (50/50, 40/60 and 30/70) as well as the impact of the filler, the curing temperature and the frequency upon gel-time have been examined based upon the rheological measurements and compared with PE/TGIC systems. Two disparate methodologies have been utilized to determine gel-time. The behaviour of dissimilar systems bearing different formulations has been compared by means of the non-isothermal DSC test. The effects of resin percentage and the formulation on physical and mechanical properties of coating have been studied.

Production of Thermoplastic Towpregs

2010 ◽  
Vol 636-637 ◽  
pp. 220-225 ◽  
Author(s):  
J.C. Velosa ◽  
João Pedro Nunes ◽  
João F. Silva ◽  
Carlos A. Bernardo ◽  
António Torres Marques
Keyword(s):  
Mechanical Properties ◽  
Carbon Fibre ◽  
Polyvinyl Chloride ◽  
Powder Coating ◽  
Commercial Applications

This work establishes process windows for efficient towpreg production on a developed powder coating equipment. Three different thermoplastic towpregs were studied: one for highly demanding markets (carbon fibre/PrimospireTMPR-120) and other two for commercial applications (glass/polypropylene and glass/polyvinyl chloride). Mechanical properties of compression moulded composites obtained from the produced towpregs were also obtained and discussed.

Fabrication of Sintered Compact from Aluminum Powder Coated with Tin Deposits by Magnetron DC Sputtering

2006 ◽  
Vol 530-531 ◽  
pp. 353-357
Author(s):  
Tsutomu Sonoda ◽  
Kenji Katou ◽  
Insu Jeon ◽  
Yasuo Yamada ◽  
Tadashi Asahina
Keyword(s):  
Mechanical Properties ◽  
Aluminum Powder ◽  
Vacuum Chamber ◽  
Convective Motion ◽  
Tensile Tests ◽  
Powder Coating ◽  
Aluminum Particles ◽  
Sintered Compact ◽  
Dc Sputtering ◽  
Tin Deposits

Fabrication of sintered compact from aluminum powder coated with tin deposits was examined, in order to enhance the bonding among the aluminum particles under the assistance of tin and thereby the sintering effect of the aluminum powder, aiming at improving the mechanical properties of sintered aluminum materials. For the coating of aluminum powder with tin deposits, the deposition of pure tin onto the aluminum particles was carried out by magnetron DC sputtering during the self-convective motion of the aluminum powder in a vacuum chamber. The tablet consisting of the aluminum powder coated with tin deposits was sintered at 650°C in a vacuum chamber for 2 hours, while the tablet consisting of non-coated aluminum powder was also sintered under the same condition for comparison. The sintered compact from the coated aluminum powder was solid and uniform, and its consolidation reached over 95% while that from non-coated aluminum powder was around 85%. According to tensile tests, the tensile strength of the sintered compact from the coated aluminum powder was 75.4N/mm2 while that from non-coated aluminum powder was 71.0N/mm2, and the elongation of the sintered compact from the coated aluminum powder reached over 20% while that from non-coated aluminum powder was around 10%. Therefore it was found that the consolidation and the mechanical properties of the sintered compact consisting of aluminum powder were considerably improved by this powder coating process.

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