Understanding and improving the thermal stability of layered ternary carbides in ceramic matrix composites

Pang, Wei Kong; Low, It-Meng

doi:10.1533/9780857098825.2.340

Cited by 13 publications

(8 citation statements)

References 28 publications

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“…The melting/sublimation points of the materials T provided in Figure 1b [43][44][45][46]. [43][44][45][46]. The stress-strain curves of chosen materials have the presence of elastic and plastic deformation zones [47,48].…”

Section: Methodsmentioning

confidence: 99%

Wire Tool Electrode Behavior and Wear under Discharge Pulses

et al. 2020

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This work is devoted to researching the tool electrode behavior and wear under discharge pulses at electrical discharge machining. The experiments were conducted on the workpieces of 12Kh18N10T (AISI 321) chrome-nickel anti-corrosion steel and D16 (AA 2024) duralumin by a 0.25-mm-diameter CuZn35 brass tool in a deionized water medium. The developed diagnostic and monitoring mean based on acoustic emission registered the oscillations accompanying machining at 4–8 kHz. The obtained workpiece and non-profiled tool surfaces were investigated by optical and scanning electron microscopy. Calculated volumetric and mass removal rates showed the difference in the character of wear at roughing and finishing. It was shown that interaction between material components in anti-corrosion steel machining had an explosive character between Zn of brass and Ni of steel at a micron level and formed multiple craters of 30–100 µm. The secondary structure and topology of worn tool surfaces were caused by material sublimation, chemical interaction between material components at high heat (10,000 °C), explosive deposition of the secondary structure. Acoustic diagnostics adequately registered the character of interaction. The observed phenomena at the submicron level and microstructure of the obtained surfaces provide grounding on the nature of material interactions and electrical erosion wear fundamentals.

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Section: Methodsmentioning

confidence: 99%

Wire Tool Electrode Behavior and Wear under Discharge Pulses

et al. 2020

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“…These properties have led to increasing interest in MAX phases for potential structural applications, nuclear, tribological and high-temperature systems [7,12,22]. MAX phases possess a hexagonal crystal structure similar to graphite and previous studies indicate lubricating properties.…”

Section: Introductionmentioning

confidence: 99%

The Lubricating Properties of Spark Plasma Sintered (SPS) Ti₃SiC₂ MAX Phase Compound and Composite

Magnus

Sharp

Rainforth

2019

Tribology Transactions

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MAX phase composites Ti3SiC2-TiCx and Ti3SiC2-(TiCX + TiC) were synthesized and consolidated via the powder metallurgy spark plasma sintering (SPS) technique. The bulk compositions and microstructural evolution of the resulting SPS discs were analysed using Xray diffraction, Raman spectroscopy and scanning electron microscopy with EDS. The tribological behaviour of the synthesized discs was investigated at room temperature under dry sliding conditions using Al2O3 ball by employing a ball-on-disc tribometer configuration. Postmortem analysis of the worn surfaces showed that the Ti3SiC2 MAX phase exhibited intrinsic self-lubricating behaviour owing to the evolution of easy shearing graphitic carbon at the sliding surface. The addition of TiC delayed the oxidation kinetics of Ti3SiC2 which favours the evolution of graphitic carbon in lieu of rutile and oxycarbide films. Thus, this work shows comprehensively the existence of intrinsic self-lubricating behaviour of Ti3SiC2 and the important role of the secondary phase TiC in the Ti3SiC2 matrix in its tribological behaviour. The wear mechanisms in both composites are dominated by tribo-oxidation triggered by frictional heating. This is then followed by deformation induced wear upon friction transition.

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“…An eddy current conductivity meter Sigmascope SMP10 (Helmut Fischer GmbH, Sindelfingen, Germany) measured the specific electrical resistance of the materials ρ used in the experiments (Table 1, The melting/sublimation points of the materials T are provided in Figure 2b [62][63][64][65][66]. The sublimation point of the nanocomposite is determined by the most low-melting component; it is alumina with the temperature T of 2072 • C in the case of the chosen nanocomposite.…”

Section: Materials and Discharge Gapmentioning

confidence: 99%

Electrical Discharge Machining of Oxide Nanocomposite: Nanomodification of Surface and Subsurface Layers

Grigoriev

Волосова

Okunkova

et al. 2020

JMMP

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The work is devoted to the research of the changes that occur in the subsurface layer of the workpiece during electrical discharge machining of conductive nanocomposite based on alumina with the use of a brass tool. The nanocomposite of Al2O3 + 30% of TiC was electroerosively machined in a water and hydrocarbon oil. The process of electrical discharge machining is accompanied by oscillations that were registered by diagnostic means. The obtained surface of the samples was researched by the means of scanning electron microscopy and X-ray photoelectron spectroscopy. The observed surface and subsurface changes provide grounding for the conclusions on the nature of processes and reactions that occur between two electrodes and nanomodification of the obtained surfaces that can be an advantage for a series of applications.

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Understanding and improving the thermal stability of layered ternary carbides in ceramic matrix composites

Cited by 13 publications

References 28 publications

Wire Tool Electrode Behavior and Wear under Discharge Pulses

Wire Tool Electrode Behavior and Wear under Discharge Pulses

The Lubricating Properties of Spark Plasma Sintered (SPS) Ti₃SiC₂ MAX Phase Compound and Composite

Electrical Discharge Machining of Oxide Nanocomposite: Nanomodification of Surface and Subsurface Layers

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Understanding and improving the thermal stability of layered ternary carbides in ceramic matrix composites

Cited by 13 publications

References 28 publications

Wire Tool Electrode Behavior and Wear under Discharge Pulses

Wire Tool Electrode Behavior and Wear under Discharge Pulses

The Lubricating Properties of Spark Plasma Sintered (SPS) Ti3SiC2 MAX Phase Compound and Composite

Electrical Discharge Machining of Oxide Nanocomposite: Nanomodification of Surface and Subsurface Layers

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The Lubricating Properties of Spark Plasma Sintered (SPS) Ti₃SiC₂ MAX Phase Compound and Composite