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Technologies
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Spark Plasma Sintering of Materials
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Spark Plasma Sintering of Materials

A special issue of Technologies (ISSN 2227-7080). This special issue belongs to the section "Innovations in Materials Processing".

Deadline for manuscript submissions: closed (30 July 2016) | Viewed by 19508

Special Issue Editor

Dr. Sandip P. Harimkar

E-Mail Website
Guest Editor
School of Mechanical and Aerospace Engineering, Oklahoma State University, Stillwater, OK 74078, USA
Interests: spark plasma sintering of materials; laser processing of materials; pulse electrodeposition; surface engineering

Special Issue Information

Dear Colleagues,

Spark plasma sintering is attracting significant interests for the processing of difficult-to-sinter and advanced materials including bulk amorphous alloys, nanostructured and fine-grained materials, ultra high temperature ceramics, nanocomposites, and coatings. This Special Issue aims to highlight the recent developments related to processing/synthesis, process modelling, microstructure/properties characterization, and scalability for spark plasma sintering of materials.

Dr. Sandip P. Harimkar
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Technologies is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • spark plasma sintering
  • field assisted sintering
  • amorphous alloys
  • nanostructured materials
  • ceramics
  • nanocomposites
  • coatings
  • process modeling

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Published Papers (3 papers)

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Research

9451 KiB  
Article
Tribological Behavior of Spark Plasma Sintered Aluminum-Graphene Composites at Room and Elevated Temperatures
by Sara Rengifo, Cheng Zhang, Sandip Harimkar, Benjamin Boesl and Arvind Agarwal
Technologies 2017, 5(1), 4; https://doi.org/10.3390/technologies5010004 - 3 Jan 2017
Cited by 22 | Viewed by 6444
Abstract
This study examines the role of Graphene nanoplatelets (GNPs) as a solid lubricant additive to aluminum. Pure Al and Al-2 vol % GNP pellets are sintered by Spark Plasma Sintering (SPS). Their tribological properties are evaluated by a ball-on-disk tribometer at room temperature [...] Read more.
This study examines the role of Graphene nanoplatelets (GNPs) as a solid lubricant additive to aluminum. Pure Al and Al-2 vol % GNP pellets are sintered by Spark Plasma Sintering (SPS). Their tribological properties are evaluated by a ball-on-disk tribometer at room temperature (RT) and high temperature (200 °C). Al-2 vol % GNP composite displayed poor densification (91%) and low hardness, resulting in poor wear resistance as compared to pure Al. However GNP addition resulted in a lower coefficient of friction (COF) as compared to pure aluminum at both temperatures. The results demonstrated that GNPs contribute to reducing COF by forming a protective tribolayer. GNPs also play a unique role in reducing oxygen ingress at 200 °C. It is concluded that the packing density of a starting powder blend of Al-GNP needs to be improved by using irregular shaped aluminum powder mixed with both larger and smaller GNPs. This would result in greater densification and improve wear rate while maintaining low COF. Full article
(This article belongs to the Special Issue Spark Plasma Sintering of Materials)
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13128 KiB  
Article
Reactive Spark Plasma Sintering and Mechanical Properties of Zirconium Diboride–Titanium Diboride Ultrahigh Temperature Ceramic Solid Solutions
by Karthiselva N. S. and Srinivasa Rao Bakshi
Technologies 2016, 4(3), 30; https://doi.org/10.3390/technologies4030030 - 9 Sep 2016
Cited by 16 | Viewed by 6944
Abstract
Ultrahigh temperature ceramics (UHTCs) such as diborides of zirconium, hafnium tantalum and their composites are considered to be the candidate materials for thermal protection systems of hypersonic vehicles due to their exceptional combination of physical, chemical and mechanical properties. A composite of ZrB [...] Read more.
Ultrahigh temperature ceramics (UHTCs) such as diborides of zirconium, hafnium tantalum and their composites are considered to be the candidate materials for thermal protection systems of hypersonic vehicles due to their exceptional combination of physical, chemical and mechanical properties. A composite of ZrB2-TiB2 is expected to have better properties. In this study, an attempt has been made to fabricate ZrB2-TiB2 ceramics using mechanically activated elemental powders followed by reactive spark plasma sintering (RSPS) at 1400 °C. Microstructure and phase analysis was carried out using X-ray diffractometer (XRD) and electron microscopy to understand microstructure evolution. Fracture toughness and hardness were evaluated using indentation methods. Nanoindentation was used to measure elastic modulus. Compressive strength of the composites has been reported. Full article
(This article belongs to the Special Issue Spark Plasma Sintering of Materials)
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12978 KiB  
Article
Dry Sliding Wear Behavior of Spark Plasma Sintered Fe-Based Bulk Metallic Glass/Graphite Composites
by Xiulin Ji, S. Habib Alavi and Sandip P. Harimkar
Technologies 2016, 4(3), 27; https://doi.org/10.3390/technologies4030027 - 2 Sep 2016
Cited by 8 | Viewed by 5673
Abstract
Bulk metallic glass (BMG) and BMG-graphite composites were fabricated using spark plasma sintering at the sintering temperature of 575 °C and holding time of 15 min. The sintered composites exhibited partial crystallization and the presence of distributed porosity and graphite particles. The effect [...] Read more.
Bulk metallic glass (BMG) and BMG-graphite composites were fabricated using spark plasma sintering at the sintering temperature of 575 °C and holding time of 15 min. The sintered composites exhibited partial crystallization and the presence of distributed porosity and graphite particles. The effect of graphite reinforcement on the tribological properties of the BMG/graphite composites was investigated using dry ball-on-disc sliding wear tests. The reinforcement of graphite resulted in a reduction in both the wear rate and the coefficient of friction as compared to monolithic BMG samples. The wear surfaces of BMG/graphite composites showed regions of localized wear loss due to microcracking and fracture, as was also the case with the regions covered with graphite-rich protective film due to smearing of pulled off graphite particles. Full article
(This article belongs to the Special Issue Spark Plasma Sintering of Materials)
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