Microstructural behavior of the heat treated n-type 95% Bi2Te3–5% Bi2Se3 gas atomized thermoelectric powders

Fabrication Of Zn4Sb3 Alloys By A Combination Of Gas-Atomization And Spark Plasma Sintering Processes

“…2(a) .576 µm corresponding to the particle sizes at 0.1, 0.5, and 0.9 volume percentages respectively. Usually, gas atomization process results fairly wide range of particle size distribution due to the variation in the cooling rate, which is inversely proportional to the size of the liquid droplets [11]. Based on the results particle size distribution of Zn-rich Zn 4 Sb 3 powders has narrower compared to Zn 4 Sb 3 size distribution.…”

“…• C above the liquidus temperature under Ar atmosphere to make the master alloy, and then bottom pouring the melt through a boron nitride melt delivery nozzle of 8 mm diameter to a N 2 gas operated atomizer working at a pressure of 1.2 MPa, the rapidly solidified powders were produced [11,12]. The size distribution of the as-atomized powders was carried out by laser diffraction technique using Mastersizer 2000 particle analyzer.…”

“…Among all of the above, gas-atomization is more attractive due to its efficient and high performance applications. It is useful for mass production of thermoelectric materials, easy process control, requires short duration of time and homogeneous pro-ductivity without isolation relative to other fabrication process [11][12][13].…”

The Physical Properties Of Aluminium-7xxx Series Alloys Produced By Powder Metallurgy Method

“…In this study; on the preparing of materials, cold and warm compaction methods, as powder compaction methods, were applied and compared the mechanical and physical properties of cold and warm compacted alloys. As known; cold compaction method is applied owing to the directly affect to other processes such as the product density, allow adsorption, diffusion of liquids such as oil and in addition to lead to carrier mobility and warm compaction method is also used due to provide good properties such as higher strength and fatigue strength, tolerances to dimensional variances, grain refinement and increasing Figure of merit (ZT) related to the lattice thermal conductivity [3][4][5][6]. The thermoelectrical efficiency of material is evaluated in terms of thermoelectrical Figure of merit (ZT).…”

Densification and microstructure of cross-roll rolled Cu–15% In powder using copper can

“…Powder metallurgy by gas atomization can provide more homogeneous and finer grained structures than melting and solidification processing [5,6]. Moreover, it is reported that cross-roll rolling is effective for applying a severe shear strain on rolled materials, leading to a refinement of the microstructure and improvement in the formability of alloy sheets [7][8][9][10][11].…”