Ultrahigh pressure SPS (HP-SPS) as new syntheses and exploration tool in materials science

Prakasam, Mythili; Balima, Félix; Cygan, S.; Klimczyk, Piotr; Jaworska, L.; Largeteau, Alain

doi:10.1016/b978-0-12-817744-0.00009-x

Cited by 9 publications

(18 citation statements)

References 27 publications

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“…The results of studying the rheological properties of YSZ powder during the SPS process with various pressing schemes are presented in Table 1. Spark plasma sintering of YSZ ceramics is satisfactorily described by Equation (1). The use of a collector pressing scheme in the SPS process can significantly increase the intensity of compaction of the test material (coefficient b).…”

Section: Resultsmentioning

confidence: 99%

“…Spark Plasma Sintering (SPS) is a widespread and promising technique for consolidation of nanostructured materials. It is widely used for nanostructured materials fabrication such as optical ceramics, composites, and functionally gradient materials for applications in various fields [1].…”

Section: Introductionmentioning

confidence: 99%

“…It allows the use of pressures up to 1 GPa without lowering the sintering temperature [7]. Various groups have reported the application of ultra-high-pressures during the SPS process (up to 10 GPa) and sintering temperatures of up to 1950 ºC by combining a pulse electric power source with Toroid (Bridgman) type or Belt type with special die construction [1,4,8,9].…”

Section: Introductionmentioning

confidence: 99%

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Manufacturing Optically Transparent Thick Zirconia Ceramics by Spark Plasma Sintering with the Use of Collector Pressing

et al. 2021

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The efficiency of using the collector pressing scheme in the Spark Plasma Sintering (SPS) process has been confirmed in improving the optical, physical, and mechanical properties of yttria-stabilized zirconia (YSZ) ceramics with an increased shape factor. An approach for developing a seal surface and determining the optimal method of increasing pressure and temperature during SPS on this surface was used to optimize the consolidation modes of the materials. It has been shown that transparent/translucent YSZ ceramics with an increased shape factor (14 mm in diameter and up to 5 mm in height, h/d = 0.36) can be successfully fabricated by the SPS technique combined with the collector pressing scheme. The optical properties and microhardness of ceramics obtained using the collector scheme are better to the optical properties of ceramics obtained using the conventional uniaxial pressing scheme.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Manufacturing Optically Transparent Thick Zirconia Ceramics by Spark Plasma Sintering with the Use of Collector Pressing

et al. 2021

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“…Spark plasma sintering (SPS) is a manufacturing method gaining popularity for high-entropy alloy test specimens and represented the second-highest portion of methods used in the papers included in this review. Milled powders are mixed and pressed into dense pellets inside the graphite die before pressure is applied to the material [ 38 ]. An AC or DC current is passed through the die and the conductive pellet material, which melts due to Joule heating.…”

Section: Heas: Manufacturing Methodsmentioning

confidence: 99%

Tribological Properties of High-Entropy Alloys under Dry Conditions for a Wide Temperature Range—A Review

2021

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High-entropy alloys (HEAs) are composed of multiple elements with equimolar or near equimolar composition that have superior mechanical and tribological properties. In this article, we present a review on the tribological performance of HEAs. The tribological properties of different HEAs systems have been evaluated, and it has been found that the wear rate strongly depends on the crystal structure of the phases. The most common structures are face-centered cubic (FCC), body-centered cubic (BCC), and dual-phase (FCC + BCC) alloys due to the high entropy of mixing instead of forming intermetallic phases. In general, HEAs with a BCC structure showed superior hardness and wear properties compared to FCC and FCC + BCC alloys. The lesser wear rate of HEAs with a BCC structure is attributed to the reductions in ductility, resulting in strong but brittle alloys. In addition to the crystal structure, the effect of temperature on the tribological performance of the HEAs is also discussed, which highlights their potential applications for high temperatures. Moreover, various other factors such as grain size, formation of an oxide layer, and wear mechanisms are discussed.

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“…Spark Plasma Sintering (SPS) is a modern method of powder compaction using compression while passing an electric current [ 7 , 121 , 122 , 123 ]. It is a technique using unidirectional pressure and direct pulsed electric current under low atmospheric pressure [ 124 ].…”

Section: Preparation Of Tial–si Alloys By Powder Metallurgy (Pm)mentioning

confidence: 99%

Development of TiAl–Si Alloys—A Review

et al. 2021

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This paper describes the effect of silicon on the manufacturing process, structure, phase composition, and selected properties of titanium aluminide alloys. The experimental generation of TiAl–Si alloys is composed of titanium aluminide (TiAl, Ti3Al or TiAl3) matrix reinforced by hard and heat-resistant titanium silicides (especially Ti5Si3). The alloys are characterized by wear resistance comparable with tool steels, high hardness, and very good resistance to oxidation at high temperatures (up to 1000 °C), but also low room-temperature ductility, as is typical also for other intermetallic materials. These alloys had been successfully prepared by the means of powder metallurgical routes and melting metallurgy methods.

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Ultrahigh pressure SPS (HP-SPS) as new syntheses and exploration tool in materials science

Cited by 9 publications

References 27 publications

Manufacturing Optically Transparent Thick Zirconia Ceramics by Spark Plasma Sintering with the Use of Collector Pressing

Manufacturing Optically Transparent Thick Zirconia Ceramics by Spark Plasma Sintering with the Use of Collector Pressing

Tribological Properties of High-Entropy Alloys under Dry Conditions for a Wide Temperature Range—A Review

Development of TiAl–Si Alloys—A Review

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