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Advanced Materials And Manufacturing Technologies | Date: 2016-12-07

A skeletal composite material includes an internal skeleton structure surrounded by a matrix material. The skeleton structure and the matrix are made of different materials having different properties. It should be appreciated that the skeleton structure and the matrix can be made of any suitable material including metal, ceramic, carbon, polymers, or combinations of these materials. Preferably, the skeleton structure and/or the matrix are made primarily of metal or ceramic. The skeletal composite material can be made by filling a skeleton structure with powder, compacting the skeleton structure and powder to form a preform, and consolidating the preform to form the skeletal composite material.


Zarebski K.,Cracow University of Technology | Putyra P.,Advanced Materials And Manufacturing Technologies
Advanced Powder Technology | Year: 2015

Iron powder-based graded products sintered by various methods were evaluated. Cylindrical samples were made from the Distaloy SE powder with different carbon content in the outer layer and core. Between the outer layer and the core, a transition zone was formed as a result of the application of special die filling technique providing mixing of the two powder compositions. The applied technique allowed the transition zone to be formed not only by the diffusion process during sintering, but earlier at the stage of product shaping. Two methods of sintering after compaction were tested, i.e. pressureless sintering and pressure-aided sintering using pulsed current, known as Spark Plasma Sintering (SPS). © 2014 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.


Trademark
Alliance Technologies Inc. and Advanced Materials And Manufacturing Technologies | Date: 2011-01-04

metal matrix composite materials primarily comprised of one or more metals, metallic alloys, metallic compounds, and metallic spheres and also containing ceramic spheres for use in the manufacture of metal-based composite articles, namely, sheets, plates, strips, bars, rods, forgings, billets, disks, rings, wire, pipes, and tubing manufactured from these composite materials for use in the aerospace, defense, oil and gas exploration, automotive, motorcycle, mining, construction, medical, recreation, sporting goods, and electronics industries.


Trademark
Alliance Technologies Inc. and Advanced Materials And Manufacturing Technologies | Date: 2011-01-04

metal matrix composite materials primarily comprised of one or more metals, metallic alloys, metallic compounds, and metallic spheres and also containing ceramic spheres for use in the manufacture of metal-based composite articles, namely, sheets, plates, strips, bars, rods, forgings, billets, disks, rings, wire, pipes, and tubing manufactured from these composite materials for use in the aerospace, defense, oil and gas exploration, automotive, motorcycle, mining, construction, medical, recreation, sporting goods, and electronics industries.


Liu J.-P.,Advanced Materials And Manufacturing Technologies | Liu J.-P.,University of Science and Technology Beijing | Liu X.-F.,Advanced Materials And Manufacturing Technologies | Liu X.-F.,University of Science and Technology Beijing | And 4 more authors.
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | Year: 2011

By moving out of induction heater for crystallizer, the solid-liquid interface was controlled at the exit of crystallizer during Ohno continuous casting(OCC). Based on the temperature field equations of melt region, liquid/solid interface, air cooling region and water cooling region, the relationship was deduced among the maximum steady-state drawing velocity, melt temperature, crystallizer length, cooling distance and water flow rate by using thermal boundary conditions. Through the solidification process of Cu-12%Al(mass fraction) wires with a diameter of 6 mm, the theoretical solutions were verified and discussed. The results show that, the maximum steady-state drawing velocity for Cu-12%Al wire decreases by 37.3% in the range of 1 150-1300°C with increment of melt temperature, increases by 28.5% in the scope of 20-30 mm with increment of crystallizer length, and decreases by 68.8% in the range of 4-12 mm with increment of cooling distance, changes weakly with cooling water flow rate in the range of 100-400 L/h. When the thermal gradient at solid-liquid interfaces is lower than 2.02°C/mm, the experimental drawing velocity cannot reach the theoretical maximum steady-state drawing velocity. When the thermal gradient at solid-liquid interface is higher than 4.17°C/mm, there is a good agreement between the experimental and theoretical values of the maximum steady-state drawing velocity.


Weissgaerber T.,Advanced Materials And Manufacturing Technologies | Kloeden B.,Advanced Materials And Manufacturing Technologies | Kieback B.,Advanced Materials And Manufacturing Technologies
Proceedings of the World Powder Metallurgy Congress and Exhibition, World PM 2010 | Year: 2010

Self-passivating tungsten-based alloys are an attractive material for application in future fusion reactors, because they combine the favourable properties of tungsten with an enhanced passive safety in the case of a loss of coolant accident. Powder metallurgical technologies have been used to prepare binary or ternary tungsten based alloys as a bulk material to improve the oxidation resistance. Silicon and chromium were chosen as the alloying elements. Elemental powder mixtures, pre-alloyed powders as well as mechanically milled powders were prepared with different alloying contents and consolidated by pressure assisted sintering technologies (hot pressing). The oxidation behaviour of tungsten alloyed with silicon and/or chromium was studied with respect to oxide growth kinetics, oxide phases and microstructure.

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