scholarly journals Interfacial Reactivity of the Filled Skutterudite Smy(FexNi1−x)4Sb12 in Contact with Liquid In-Based Alloys and Sn

Metals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 364 ◽  
Author(s):  
Giovanna Latronico ◽  
Fabrizio Valenza ◽  
Riccardo Carlini ◽  
Paolo Mele ◽  
Cristina Artini
Keyword(s):  
Cross Section ◽  
Sessile Drop ◽  
Sessile Drop Method ◽  
Thermoelectric Device ◽  
Strong Reaction ◽  
Filled Skutterudite ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
One Step ◽  
Interfacial Reactivity

The study of the wettability of thermoelectric materials, as well as the search for the most proper brazing alloys, is of the maximum importance to get one step closer to the realization of a thermoelectric device. In this work, a wettability study of the filled skutterudite Smy(FexNi1−x)4Sb12 by Sn and In-based alloys is presented. Samples, having both p- and n- characters were prepared by the conventional melting-quenching-annealing technique and subsequently densified by spark plasma sintering (SPS). Afterward, wettability tests were performed by the sessile drop method at 773 K for 20 min. Scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS) analyses performed on the cross-section of the solidified drops suggest quite a complicated scenario due to the coexistence and the interaction of a large number of different elements in each analyzed system. Indeed, the indication of a strong reaction of In-based alloys with skutterudite, accompanied by the formation of the InSb intermetallic compound, is clear; on the contrary, Sn exhibits a milder reactivity, and thus, a more promising behavior, being its appreciable wettability, whilst coupled to a limited reactivity.

One-Step Synthesis and Sintering of MgB2 by Spark Plasma Sintering

2012 ◽  
Vol 26 (2) ◽  
pp. 361-369
Author(s):  
Viorel Sandu ◽  
Gheorghe Aldica ◽  
Raluca Damian ◽  
Zhi-Chao Guo ◽  
Hong-Li Suo
Keyword(s):  
Spark Plasma Sintering ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
One Step

Spark Plasma Synthesis/Sintering of Dense Ceramic, Intermetallic and Composite Materials

2006 ◽  
Vol 45 ◽  
pp. 1411-1416
Author(s):  
Antonio Mario Locci ◽  
Roberta Licheri ◽  
Roberto Orrù ◽  
A. Cincotti ◽  
Giacomo Cao
Keyword(s):  
Mechanical Load ◽  
Plasma Synthesis ◽  
Simultaneous Application ◽  
Plasma Sintering ◽  
Pulsed Dc ◽  
Spark Plasma ◽  
One Step ◽  
Powder Particles ◽  
Dc Current ◽  
Spark Plasma Synthesis

Spark Plasma Sintering (SPS) represents a very attractive technique for the obtainment of dense materials including nanostructured ones. SPS basically consists in the simultaneous application of a pulsed DC current and an uniaxial mechanical load through a powder compact. Other than providing rapid Joule heating and likely enhancing mass transport through electromigration, the imposed pulsed high current is also reported to generate a plasma within the voids surrounding the powder particles, thus facilitating the removal of oxides surface layers that may hinder the sintering process. Selected results obtained through SPS in our laboratory for the preparation of a wide variety of materials, i.e. TiC-TiB2, MgB2, and NbAl3, will be presented in this work. Specifically, all the chosen examples are related to the use of the SPS technique for obtaining the desired material by simultaneously performing synthesis and consolidation stages in one-step.

One-Step Synthesis of a 12CaO[middle dot]7Al2O3 Electride via the Spark Plasma Sintering (SPS) Method

2011 ◽  
Vol 14 (12) ◽  
pp. E41 ◽  
Author(s):  
Jun Ho Chung ◽  
Jeong Ho Ryu ◽  
Jong Won Eun ◽  
Bong Geun Choi ◽  
Kwang Bo Shim
Keyword(s):  
Spark Plasma Sintering ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
One Step

scholarly journals Shaping of Nanostructured Materials or Coatings through Spark Plasma Sintering

2012 ◽  
Vol 706-709 ◽  
pp. 24-30 ◽  
Author(s):  
Claude Estournès ◽  
Djar Oquab ◽  
Serge Selezneff ◽  
Mathieu Boidot ◽  
Daniel Monceau ◽  
...  
Keyword(s):  
Spark Plasma Sintering ◽  
Thermal Barrier ◽  
Simultaneous Application ◽  
Biomimetic Apatite ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
One Step ◽  
Sintering Mechanisms ◽  
Full Densification

In the field of advanced ceramics, Spark Plasma Sintering (SPS) is known to be very efficient for superfast and full densification of ceramic nanopowders. This property is attributed to the simultaneous application of high density dc pulsed current and load, even though the sintering mechanisms involved remain unclear. In the first part of the paper, the mechanisms involved during SPS of two insulating oxide nanopowders (Al2O3 and Y2O3) are discussed while in the second part illustrations of the potential of SPS will be given for (i) Consolidation of mesoporous or unstable nanomaterials like SBA-15 or biomimetic apatite, respectively; (ii) Densification of core (BT or BST)/shell (SiO2 or Al2O3) nanoparticles with limited or controlled reaction at the interface. (iii) In-situ preparation of surface-tailored Fe–FeAl2O4–Al2O3 nanocomposites, and finally (iv) One-step preparation of multilayer materials like a complete thermal barrier system on single crystal Ni-based superalloy.

Preparation of SiC-Based Thermoelectric Device by Spark Plasma Sintering

2003 ◽  
Vol 423-425 ◽  
pp. 355-358
Author(s):  
Yasutoshi Noda ◽  
Hiroyuki Kitagawa ◽  
Naomi Kado ◽  
Yu Ueda ◽  
Nobuyuki Kanayama
Keyword(s):  
Spark Plasma Sintering ◽  
Thermoelectric Device ◽  
Plasma Sintering ◽  
Spark Plasma

One-Step Sintering of CoSb3 Thermoelectric Material and Cu-W Alloy by Spark Plasma Sintering

2009 ◽  
Vol 610-613 ◽  
pp. 389-393 ◽  
Author(s):  
De Gang Zhao ◽  
Li Wang ◽  
Yan Hong Cai ◽  
Wan Jiang ◽  
Li Dong Chen
Keyword(s):  
Spark Plasma Sintering ◽  
Surface Zone ◽  
Shear Tests ◽  
Interface Area ◽  
Element Analysis ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
One Step ◽  
Electrode Interface ◽  
Te Material

In this study, we designed a suitable electrode material was designed, Cu-W alloy, which achieved a good thermal match with CoSb3 thermoelectric (TE) material. By means of spark plasma sintering (SPS), Cu-W alloy was introduced into CoSb3/Ti/Cu-W TE element successfully. Finite element analysis showed that the maximum thermal residual stress appeared at the cylindrical surface zone close to the CoSb3/electrode interface. SEM and EPMA results showed that an intermetallic compound (IMC) layer formed at the CoSb3/Ti interface and EDS analysis confirmed the IMC layer was TiSb phase. Shear tests showed that the shear strength of CoSb3/Ti/Cu70W30 joint was about 50Mpa. The potential profile of the interface area was measured by the four-probe method and the result showed no abrupt change in voltage was found around the interface. The high temperature reliability evaluation showed the joint had high thermal duration stability.

scholarly journals Dense nanostructured materials obtained by spark plasma sintering and field activated pressure assisted synthesis starting from mechanically activated powder mixtures

2004 ◽  
Vol 36 (3) ◽  
pp. 155-164 ◽  
Author(s):  
F. Bernard ◽  
Gallet le ◽  
N. Spinassou ◽  
S. Paris ◽  
E. Gaffet ◽  
...  
Keyword(s):  
Spark Plasma Sintering ◽  
Nanostructured Materials ◽  
Bulk Materials ◽  
Mechanical Pressure ◽  
Powder Mixtures ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
One Step ◽  
Nanostructured Ceramics ◽  
Simultaneous Influence

The preparation of highly dense bulk materials with a grain size in the range of a few to a few hundreds nanometers is currently the objective of numerous studies. In our research we have achieved a measure of success in this regard by using the methods of mechanically-activated, field-activated, pressure-assisted synthesis, MAFAPAS, which has been patented, and mechanically-activated spark plasma sintering, MASPS. Both methods, which consist of the combination of a mechanical activation step followed by a consolidation step under the simultaneous influence of an electric field and mechanical pressure, have led to the formation of dense nanostructured ceramics, intermetallics, and composites, such as, MoSi2 FeAl, NbAl3, and TiN-TiB2. In this report, both one-step synthesis-consolidation and sintering of different nanostructured materials by SPS and FAPAS were investigated. .

Facile synthesis of Ag2Te nanowires and thermoelectric properties of Ag2Te polycrystals sintered by spark plasma sintering

CrystEngComm ◽  
2019 ◽  
Vol 21 (11) ◽  
pp. 1718-1727 ◽  
Author(s):  
Yi Chang ◽  
Jun Guo ◽  
Yun-Qiao Tang ◽  
Yi-Xing Zhang ◽  
Jing Feng ◽  
...  
Keyword(s):  
Spark Plasma Sintering ◽  
Thermoelectric Properties ◽  
Solvothermal Method ◽  
Facile Synthesis ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
One Step

Ag2Te nanowires with a diameter of approximately 200 nm and a length of several micrometers were prepared using a simple one-step solvothermal method without templates and surfactants.

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