Influence of pulsed current during high pressure sintering on crystallite size and phase composition of diamond with Ti B bonding phase

Jaworska, L.; Karolus, M.; Cygan, S.; Morgiel, J.; Cyboroń, Jolanta; Laszkiewicz-Łukasik, Jolanta; Putyra, Piotr

doi:10.1016/j.ijrmhm.2017.09.011

Cited by 8 publications

(7 citation statements)

References 22 publications

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“…Figure 10 ). No clear explanation of these differences is provided in the reference [ 58 ] but these observations show that HP-SPS device offers a very promising prospect for obtaining diamond-based materials with improved properties.…”

Section: Recent Progress Of Various Hp-sps Technologiesmentioning

confidence: 97%

“…More recently, this HP-SPS device was used to conduct a very interesting comparison between the sintering of diamond composite with Ti + 2B mixture, first using a “classical” high-pressure–high-temperature (HP–HT) press and secondly using this SPS-HP device under the same (P,T) conditions (at 8.0 ± 0.2 GPa and at the temperature of 1650 ± 50 °C during 20 s of dwell time) [ 58 ]. During this study, the graphitization process, which is a very important factor when sintering diamond powders, is found to be much more important during sintering with the HP–HT device than with the HP-SPS one, as proven by transmission electron microscopy analysis (cf.…”

Section: Recent Progress Of Various Hp-sps Technologiesmentioning

confidence: 99%

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Recent Developments of High-Pressure Spark Plasma Sintering: An Overview of Current Applications, Challenges and Future Directions

Godec

Floch

2023

Materials

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Spark plasma sintering (SPS), also called pulsed electric current sintering (PECS) or field-assisted sintering technique (FAST) is a technique for sintering powder under moderate uniaxial pressure (max. 0.15 GPa) and high temperature (up to 2500 °C). It has been widely used over the last few years as it can achieve full densification of ceramic or metal powders with lower sintering temperature and shorter processing time compared to conventional processes, opening up new possibilities for nanomaterials densification. More recently, new frontiers of opportunities are emerging by coupling SPS with high pressure (up to ~10 GPa). A vast exciting field of academic research is now using high-pressure SPS (HP-SPS) in order to play with various parameters of sintering, like grain growth, structural stability and chemical reactivity, allowing the full densification of metastable or hard-to-sinter materials. This review summarizes the various benefits of HP-SPS for the sintering of many classes of advanced functional materials. It presents the latest research findings on various HP-SPS technologies with particular emphasis on their associated metrologies and their main outstanding results obtained. Finally, in the last section, this review lists some perspectives regarding the current challenges and future directions in which the HP-SPS field may have great breakthroughs in the coming years.

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Section: Recent Progress Of Various Hp-sps Technologiesmentioning

confidence: 97%

Section: Recent Progress Of Various Hp-sps Technologiesmentioning

confidence: 99%

Recent Developments of High-Pressure Spark Plasma Sintering: An Overview of Current Applications, Challenges and Future Directions

Godec

Floch

2023

Materials

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“…The first group, from the University of Krakow, Poland, coupled a Bridgman type toroid large volume press and a homemade 50 Hz alternating or 1 kHz pulsed current injected inside the sample thanks to an adapted designed assembly ( Figure 1 ) [ 35 , 36 , 37 ]. Typically, assembly consists of a pressure transmitting medium (ceramic) in which a graphite furnace is inserted in which sample ( 15 mm diameter and 5 mm thickness) is loaded at the center.…”

Section: Recent Developments: Uhp-spsmentioning

confidence: 99%

“…Using this setup, very refractory phases were sintered and the combine effect of pressure and SPS allows to decrease sintering temperature and time, and therefore maintain a nano-grain structure with enhanced mechanical properties [ 35 , 36 ]. Another study compared classic HP-HT (sample electrically isolated) and UHP-SPS of diamond-TiB 2 composite under similar conditions of pressure and temperature [ 37 ]. Due to the advantages of SPS, diamond remains stable whereas it destabilizes to graphite using classic HP-HT [ 37 ], making UHP-SPS a promising tool to sinter high pressure phases even at metastable/unequilibrium conditions.…”

Section: Recent Developments: Uhp-spsmentioning

confidence: 99%

“…Another study compared classic HP-HT (sample electrically isolated) and UHP-SPS of diamond-TiB 2 composite under similar conditions of pressure and temperature [ 37 ]. Due to the advantages of SPS, diamond remains stable whereas it destabilizes to graphite using classic HP-HT [ 37 ], making UHP-SPS a promising tool to sinter high pressure phases even at metastable/unequilibrium conditions.…”

Section: Recent Developments: Uhp-spsmentioning

confidence: 99%

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High Pressure (HP) in Spark Plasma Sintering (SPS) Processes: Application to the Polycrystalline Diamond

2022

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High-Pressure (HP) technology allows new possibilities of processing by Spark Plasma Synthesis (SPS). This process is mainly involved in the sintering process and for bonding, growing and reaction. High-Pressure tools combined with SPS is applied for processing polycrystalline diamond without binder (binderless PCD) in this current work. Our described innovative Ultra High Pressure Spark Plasma Sintering (UHP-SPS) equipment shows the combination of our high-pressure apparatus (Belt-type) with conventional pulse electric current generator (Fuji). Our UHP-SPS equipment allows the processing up to 6 GPa, higher pressure than HP-SPS equipment, based on a conventional SPS equipment in which a non-graphite mold (metals, ceramics, composite and hybrid) with better mechanical properties (capable of 1 GPa) than graphite. The equipment of UHP-SPS and HP-SPS elements (pistons + die) conductivity of the non-graphite mold define a Hot-Pressing process. This study presents the results showing the ability of sintering diamond powder without additives at 4–5 GPa and 1300–1400 °C for duration between 5 and 30 min. Our described UHP-SPS innovative cell design allows the consolidation of diamond particles validated by the formation of grain boundaries on two different grain size powders, i.e., 0.75–1.25 μm and 8–12 μm. The phenomena explanation is proposed by comparison with the High Pressure High Temperature (HP-HT) (Belt, toroidal-Bridgman, multi-anvils (cubic)) process conventionally used for processing binderless polycrystalline diamond (binderless PCD). It is shown that using UHP-SPS, binderless diamond can be sintered at very unexpected P-T conditions, typically ~10 GPa and 500–1000 °C lower in typical HP-HT setups. This makes UHP-SPS a promising tool for the sintering of other high-pressure materials at non-equilibrium conditions and a potential industrial transfer with low environmental fingerprints could be considered.

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Perspectives on the spark plasma sintering process

Munir

Ohyanagi

2020

J Mater Sci

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Influence of pulsed current during high pressure sintering on crystallite size and phase composition of diamond with Ti B bonding phase

Cited by 8 publications

References 22 publications

Recent Developments of High-Pressure Spark Plasma Sintering: An Overview of Current Applications, Challenges and Future Directions

Recent Developments of High-Pressure Spark Plasma Sintering: An Overview of Current Applications, Challenges and Future Directions

High Pressure (HP) in Spark Plasma Sintering (SPS) Processes: Application to the Polycrystalline Diamond

Perspectives on the spark plasma sintering process

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