Formation of Fe<sub>3</sub>AlC Base Alloy by Mechanical Alloying and Vacuum Hot Pressing

Fabrication of Fe3AlC matrix in-situ composite, reinforced by a FeAl phase, was studied by using the powder metallurgical processing route. Especially, in order to disperse the second phase more finely, we chose the mechanical alloying process. We investigated the microstructural and mechanical properties of the consolidated material. After consolidation by vacuum hot pressing, the compact showed almost full density and consisted of a Fe3AlC matrix and FeAl second phase (average particle size was less than 1μm). The compact showed HV746, which was higher than that of the arc melted Fe3AlC monolithic material, HV650.

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Microstructure and mechanical properties of FeCoCrNiMnTi0.1C0.1 high-entropy alloy produced by mechanical alloying and vacuum hot pressing sintering

Vacuum ◽

10.1016/j.vacuum.2019.04.043 ◽

2019 ◽

Vol 165 ◽

pp. 297-304 ◽

Cited By ~ 15

Author(s):

Xiaoqiang Liu ◽

Hu Cheng ◽

Zhanjiang Li ◽

Hao Wang ◽

Fa Chang ◽

...

Keyword(s):

Mechanical Properties ◽

Mechanical Alloying ◽

Hot Pressing ◽

High Entropy Alloy ◽

High Entropy ◽

Vacuum Hot Pressing ◽

Microstructure And Mechanical Properties ◽

Hot Pressing Sintering

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Thermoelectric properties of Fe-doped CoSb3 prepared by mechanical alloying and vacuum hot pressing

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2006.08.369 ◽

2007 ◽

Vol 442 (1-2) ◽

pp. 358-361 ◽

Cited By ~ 22

Author(s):

Soon-Chul Ur ◽

Joon-Chul Kwon ◽

Il-Ho Kim

Keyword(s):

Mechanical Alloying ◽

Thermoelectric Properties ◽

Hot Pressing ◽

Vacuum Hot Pressing

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Synthesis and Thermoelectric Properties of Undoped Half-Heusler Zr-Co-Sb Alloy Processed by Mechanically Alloying and Hot Pressing

Materials Science Forum ◽

10.4028/www.scientific.net/msf.695.69 ◽

2011 ◽

Vol 695 ◽

pp. 69-72

Author(s):

Il Ho Kim ◽

Joon Chul Kwon ◽

Young Geun Lee ◽

Sung Lim Ryu ◽

Man Soon Yoon ◽

...

Keyword(s):

Mechanical Alloying ◽

Thermoelectric Properties ◽

Thermoelectric Materials ◽

Hot Pressing ◽

Heusler Alloys ◽

Processing Route ◽

Mechanically Alloyed ◽

Fundamental Study ◽

Vacuum Hot Pressing ◽

Fine Grain

Half-Heusler alloys are one of the potential thermoelectric materials for medium to high temperature range application. As a part of fundamental study to establish processing route and to observe thermoelectric properties in undoped state, ZrCoSb was selected, processed and evaluated. In an attempt to produce a half-Heusler thermoelectric materials having ultra fine grain structures, ZrCoSb was synthesized by mechanical alloying of stoichiometric elemental powder compositions, and consolidated by vacuum hot pressing. Phase transformations during mechanical alloying and hot consolidation were investigated using XRD, SEM and EDS. Single-phase, half-Heusler was successfully produced by vacuum hot pressing using as-milled powders without subsequent annealing. Thermoelectric properties as functions of temperature were evaluated in terms of Seebeek coefficient, electrical conductivity, thermal conductivity and the figure of merit for the hot pressed specimens. Mechanically alloyed half-Heusler phase, ZrCoSb, appeared to have a great potential as a thermoelectric materials in this study.

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