Topic
Powder metallurgy
About: Powder metallurgy is a research topic. Over the lifetime, 19751 publications have been published within this topic receiving 238540 citations.
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TL;DR: In this paper, the effect of alumina particle size, sintering temperature and time on the properties of Al-Al 2 O 3 composite were investigated, including density, hardness, microstructure, yield strength, compressive strength and elongation to fracture.
345 citations
TL;DR: In this paper, a strategy called flake powder metallurgy (flake PM) was used to achieve a uniform distribution of carbon nanotubes (CNTs) in CNT/Al composites and thus realize the potential of CNTs as a reinforcement.
338 citations
TL;DR: Powder metallurgy (PM) of titanium is a potentially cost-effective alternative to conventional wrought titanium as mentioned in this paper, which examines both traditional and emerging technologies, including the prod...,.
Abstract: Powder metallurgy (PM) of titanium is a potentially cost-effective alternative to conventional wrought titanium. This article examines both traditional and emerging technologies, including the prod...
336 citations
TL;DR: In this article, a pin-on-ring tribometer was used to test the wear properties of graphite composites of 8, 15, and 20% graphite powders.
335 citations
25 Oct 2003-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this article, the effects of processing parameters such as laser power, scan rate, scan line spacing, thickness of layer, scanning geometry and sintering atmosphere were studied, and it was found that the sintered density increased sharply with increasing the specific energy input until a critical energy input had been reached.
Abstract: The densification behavior and the attendant microstructural features of iron powder processed by direct laser sintering were investigated. The effects of processing parameters such as laser power, scan rate, scan line spacing, thickness of layer, scanning geometry and sintering atmosphere were studied. A specific energy input (ψ) was defined using the “energy conservation” rule to explore the effects of the processing condition on the density and the attendant microstructure of laser sintered iron. It was found that the sintered density increased sharply with increasing the specific energy input until a critical energy input had been reached (ψ∼0.2 kJ mm−3). The microstructure consists of large pores (>0.5 mm) and elongated ferrite grains parallel to the building direction. The increase in the sintered density was followed with further increasing the specific energy, but at slower rate. Intensifying the energy input over 0.8 kJ mm−3 leads to the formation of horizontally elongated pores while the sintered density remains almost constant. The inter-agglomerates are fully dense and consist of elongated ferrite grains which are oriented parallel to the building direction. The iron powder was used as a model material so the outcomes are generic and can be applied to other material systems with congruent melting point or systems which melting/solidification approach is the mechanism feasible for the rapid bonding of metal powders in direct laser sintering.
335 citations