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The conventional fusion welding of cast aluminium alloys is generally difficult due to some common defects such as porosity, oxide inclusion, and hot cracking, which in turn reduce the weld strength. In recent years, friction stir welding (FSW) was found to be very effective for the welding of various wrought aluminum alloys. This paper investigates a metal joining process called Friction Stir Welding...
In recent years the development of tissue engineered scaffolds from biodegradable polymers has been advancing because of their use as support material for tissue regeneration. This paper describes the various ideal biopolymers and their essential characteristics to suitable for tissue engineering applications. The functional characteristics of biomaterial include the optimization of porosity, wet...
Nickel foam is mainly used for the battery electrode materials specifically for MH-Ni batteries, which can be widely used in the portable computers, the mobile phones and the hybrid electric vehicle. It is important to study the mechanical properties. The effects of the porosity and model type of the open cell nickel foam on the tensile behavior were investigated. With the finite element method based...
In the present study, the spark plasma sintering technique is used to densify commercial alloy NiCoCrAlYTa. NiCoCrAlYTa powders are sintered at temperatures ranging between 1073??K and 1273??K to yield various microstructures. Full compaction is achieved in a short period of time and the overall processing duration does not exceed 30 min. Microstructure and porosity evaluations were conducted using...
The features of materials alloying from gas and metallic plasma, as well as due to the mixing process in liquid phase are investigated in this study. Surface modification of Mo, W, Ni, TiAlN, FeB, Co-32Ni-21Cr-8Al-0.5Y, ZrO2, Ti64, Hastelloy, WC-Co, and WC-Ni under pulsed plasma irradiation is analyzed. Results show that pulsed plasma treatment improves the physical (grain size, surface roughness,...
Decreasing the length of thermoelectric (TE) module legs results in a significant increase in power density, both for cooling applications and electricity generation. However, this reduction also results in a significant increase of mechanical stress in the legs materials. Thus, it is important to implement an effective method to characterize the mechanical properties, such as mechanical spectroscopy,...
Laser thermal treatment of organosilicate coatings in a process characterized by extremely short dwell times and extremely high temperatures, generally referred to as laser spike anneal (LSA) appears to be a viable approach to post-porosity enhancement of mechanical properties. Exposure of organosilicates in both the dense and porous state to very high temperatures (500-1300 degC) for extremely short...
The purpose of this study was to prepare a 3D nanocomposite bone substitute prepared from gelatin (GEL) and synthesized hydroxyapatite (HAP) in order to mimic natural bone feathers through a novel layer solvent casting combined freeze-drying technique. The adhesion between superimposed layers was ensured by applying a GEL solution. Furthermore, samples were cross-linked with 1% glutaraldehyde (GA)...
A novel porous polymer scaffold fabricated by salt-leaching method for tissue engineering was developed and the mechanical properties and porosity were investigated in our study. Scanning electronic microscopy (SEM) was employed to observe the morphology and structure of porous scaffolds. Cytocompatibility of the porous scaffolds were evaluated, using HL-7702 cells as model, in terms of cell attachment...
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