Fabrication and Performance Simulation of Microscale Thermoelectric Modules Made with Bi2Te3-Based Alloys

2011 ◽  
Vol 483 ◽  
pp. 75-77 ◽  
Author(s):  
Da Wei Liu ◽  
Jing Feng Li
Keyword(s):  
Peltier Effect ◽  
Micro Electro Mechanical Systems ◽  
Thermoelectric Modules ◽  
Plasma Sintering ◽  
Potential Applications ◽  
In Series ◽  
Spark Plasma ◽  
And Performance ◽  
Te Modules ◽  
Mechanical Cutting

Micro or nano scale thermoelectric (TE) modules have received increasing attention because of their potential applications as energy supplyingand thermal managing components in microelectronic devices and micro-electro-mechanical systems (MEMS). In the present work, microscale thermoelectric modules are fabricated by combining mechanical cutting and photolithograph processes from nano-sized silicon carbide (SiC) particles reinforced Bi2Te3-based materials (Bi2Te3 for n type, and Bi0.5Sb1.5Te3 for p type) prepared by spark plasma sintering (SPS). The fabricated modules have 28 pairs of thermoelectric legs in an area of 3×3 mm2, and each of them is 200×400 µm2 in cross section and 600 µm in length, which is connected in series by Ni-Cu electrodes made with photolithograph patterning and magnetron sputtering. The thermoelectric performances of a p-n couple are simulated with the finite element method (FEM) under a thermal-electrical coupled multi-physics field for both electronic cooling (Peltier effect) and thermoelectric energy generation (Seebeck effect) working mold.

scholarly journals Feasibility of Cobalt-Free Nanostructured WC Cutting Inserts for Machining of a TiC/Fe Composite

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3432
Author(s):  
Edwin Gevorkyan ◽  
Mirosław Rucki ◽  
Tadeusz Sałaciński ◽  
Zbigniew Siemiątkowski ◽  
Volodymyr Nerubatskyi ◽  
...  
Keyword(s):  
Cubic Boron Nitride ◽  
Cutting Tools ◽  
Cutting Speed ◽  
Machined Surface ◽  
Powder Consolidation ◽  
Plasma Sintering ◽  
Cutting Inserts ◽  
Spark Plasma ◽  
And Performance ◽  
Nanostructured Tungsten Carbide

The paper presents results of investigations on the binderless nanostructured tungsten carbide (WC) cutting tools fabrication and performance. The scientific novelty includes the description of some regularities of the powder consolidation under electric current and the subsequent possibility to utilize them for practical use in the fabrication of cutting tools. The sintering process of WC nanopowder was performed with the electroconsolidation method, which is a modification of spark plasma sintering (SPS). Its advantages include low temperatures and short sintering time which allows retaining nanosize grains of ca. 70 nm, close to the original particle size of the starting powder. In respect to the application of the cutting tools, pure WC nanostructure resulted in a smaller cutting edge radius providing a higher quality of TiC/Fe machined surface. In the range of cutting speeds, vc = 15–40 m/min the durability of the inserts was 75% of that achieved by cubic boron nitride ones, and more than two times better than that of WC-Co cutting tools. In additional tests of machining 13CrMo4 material at an elevated cutting speed of vc = 100 m/min, binderless nWC inserts worked almost three times longer than WC-Co composites.

Fabrication of thermoelectric modules with Mg2Si and SrRuO3 by the spark plasma sintering method

2012 ◽  
Author(s):  
Keishi Nishio ◽  
Yukie Sawada ◽  
Koya Arai ◽  
Tatsuya Sakamoto ◽  
Yasuo Kogo ◽  
...  
Keyword(s):  
Spark Plasma Sintering ◽  
Thermoelectric Modules ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Sintering Method

scholarly journals Sintering Behavior of CNT Reinforced Al6061 and Al2124 Nanocomposites

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Nouari Saheb
Keyword(s):  
Ball Milling ◽  
Sintering Behavior ◽  
Automotive Electronics ◽  
Composite Powders ◽  
Plasma Sintering ◽  
The Matrix ◽  
Potential Applications ◽  
Spark Plasma ◽  
Nanocomposite Powders ◽  
Very High

Ball milling and spark plasma sintering were successfully used to produce carbon nanotube reinforced Al6061 and Al2124 nanocomposites which have potential applications in the fields of aerospace, automotive, electronics, and high precision instrumentation. Al2124 and Al6061 nanocomposite powders containing 0.5 to 2 wt.% CNTs prepared through sonication and wet ball milling were spark plasma sintered at 400, 450, and 500°C for 20 minutes under a pressure of 35 MPa. CNTs were better dispersed, and less agglomerated and had good adhesion to the matrix in composites containing 1 wt.% CNTs. The increase of CNT content to 2 wt.% led to the formation of CNT clusters which resulted in less uniform and homogenous composite powders. Almost full densification of Al6061 reinforced with CNTs was achieved at 500°C. Also, CNTs reinforced Al2124 nanocomposites reached very high densities at 500°C. Composites reinforced with 1 wt.% CNTs displayed better densification compared to composites containing 2 wt.% CNTs. The increase of CNTs content from 0.5 to 1 wt.% increased the hardness of the Al6061 and Al2124 alloys to maximum values. Further increase of CNTs content to 2 wt.% decreased the hardness to values lower than that of the monolithic alloys.

scholarly journals Peltier effect during spark plasma sintering of boron carbide

2021 ◽  
pp. 104719
Author(s):  
Joseph Diatta ◽  
Elisa Torresani ◽  
Andrey Maximenko ◽  
Chris Haines ◽  
Darold Martin ◽  
...  
Keyword(s):  
Boron Carbide ◽  
Spark Plasma Sintering ◽  
Peltier Effect ◽  
Plasma Sintering ◽  
Spark Plasma

Peltier effect during spark plasma sintering (SPS) of thermoelectric materials

2017 ◽  
Vol 52 (17) ◽  
pp. 10341-10352 ◽  
Author(s):  
Giovanni Maizza ◽  
Gioacchino Dario Mastrorillo ◽  
Salvatore Grasso ◽  
Huanpo Ning ◽  
Michael J. Reece
Keyword(s):  
Spark Plasma Sintering ◽  
Thermoelectric Materials ◽  
Peltier Effect ◽  
Plasma Sintering ◽  
Spark Plasma

scholarly journals Process Optimization of In Situ Magnetic-Anisotropy Spark Plasma Sintering of M-Type-Based Barium Hexaferrite BaFe12O19

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2650
Author(s):  
Haetham G. Mohammed ◽  
Thar Mohammed Badri Albarody ◽  
Susilawati Susilawati ◽  
Soheil Gohari ◽  
Aris Doyan ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Spark Plasma Sintering ◽  
Sintering Temperature ◽  
Barium Hexaferrite ◽  
Optimum Process ◽  
Plasma Sintering ◽  
In Series ◽  
Spark Plasma ◽  
Measure Of Performance

This paper introduces a new spark plasma sintering technique that is able to order crystalline anisotropy by in-series/in situ DC electric coupled magnetic field. The process control parameters have been investigated on the production of anisotropic BaFe12O19 magnets based on resulted remanence (Mr). Sintering holding time (H.T.), cooling rate (C.R.), pressure (P), and sintering temperature (S.T.) are optimized by Taguchi with L9 orthogonal array (OA). The remanent magnetization of nanocrystalline BaFe12O19 in parallel (Mrǁ) and perpendicular (MrꞱ) to the applied magnetic field was regarded as a measure of performance. The Taguchi study calculated optimum process parameters, which significantly improved the sintering process based on the confirmation tests of BaFe12O19 anisotropy. The magnetic properties in terms of Mrǁ and MrꞱ were greatly affected by sintering temperature and pressure according to ANOVA results. In addition, regression models were developed for predicting the Mrǁ as well as MrꞱ respectively.

scholarly journals FRACTURE BEHAVIOR OF FeAlSi INTERMETALLICS

2020 ◽  
Vol 27 ◽  
pp. 6-12
Author(s):  
Jaroslav Čech ◽  
Petr Haušild ◽  
Miroslav Karlík ◽  
Kateřina Nová ◽  
Filip Průša ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Temperature ◽  
Chemical Composition ◽  
Fracture Resistance ◽  
Fracture Behavior ◽  
Intermetallic Alloy ◽  
Mechanically Alloyed ◽  
Plasma Sintering ◽  
Potential Applications ◽  
Spark Plasma

The study is devoted to the intermetallic alloy FeAl20Si20 (wt.%) with the potential applications in high temperature aggressive environments. The samples of the same chemical composition were prepared by spark plasma sintering from the different mechanically alloyed powders (pure elements and pre-alloyed powders). Differences in mechanical properties were characterized. Whereas no significant differences were found in hardness and Young´s modulus, fracture resistance was higher for the samples from pre-alloyed powders in which Palmqvist and lateral cracks were observed (contrary to the sample made of pure elements where only Palmqvist cracks were identified).

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