High Temperature Mechanical Behavior of Silicon Nitride Ceramics

Mélendez-Martı́nez, J.J.; Jiménez–Melendo, M.; Domínguez‐Rodríguez, Arturo; Wötting, G.

doi:10.4028/www.scientific.net/msf.383.13

Cited by 5 publications

(13 citation statements)

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“…Although the same nominal loads were applied, different pressures were applied. Because the ceramics can retain a higher elastic modulus than HSSs at high temperatures [32], they can generate higher Hertz contact stresses.…”

Section: Difference In Deformation Layer Depthmentioning

confidence: 99%

“…When these tribo-oxide layers are formed and begin to develop further, the debris can be captured more easily by the obstacles on these tribo-oxide layers [2]. The development of such a tribo-oxide layer is widely acknowledged to be the solution to severe adhesive wear between contact sliding metals at elevated temperatures [17,31,32].…”

Section: Summary Of Wear Mechanismsmentioning

confidence: 99%

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Tribological behavior comparisons of high chromium stainless and mild steels against high-speed steel and ceramics at high temperatures

et al. 2021

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High-temperature tribology, which is often involved during hot metal forming, is controlled via oxidation on a rubbing surface. However, for high chromium stainless steel (ST), where oxidation is strongly inhibited, the effect of counterface materials on tribological behavior is yet to be elucidated. In this study, the effects of counterfaces on the tribological behavior of 253MA ST and mild steel (MS) are investigated via a ball-on-disc test at 900 °C using a 20 N load. The results reveal that high-speed steel (HSS) experiences severe abrasive wear with MS and causes severe sticking problems with ST. Si3N4 and SiC present substantially stronger abrasive wear resistance than HSS with MS, and the friction coefficients are dependent on the type of ceramic. Both ceramics can facilitate the establishment of a thick tribo-oxide layer (> 3 µm) on ST to prevent sticking; however, this is accompanied by severe pull-out and fracture wear. The effects of the counterface on the mechanical properties of the tribo-oxide layer, near-surface transformation, and the responses of the tribo-oxide layer to friction and wear are discussed. This study contributes to the understanding of interfacial tribological behaviors when different types of tools are used on MS and ST.

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Section: Difference In Deformation Layer Depthmentioning

confidence: 99%

Section: Summary Of Wear Mechanismsmentioning

confidence: 99%

Tribological behavior comparisons of high chromium stainless and mild steels against high-speed steel and ceramics at high temperatures

et al. 2021

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“…3(c) and 3(e), which can be attributed to restraining of mullite between the grain boundary of AT during the synthesis process. 16) After being treated at 1100°C for 120 h, it is found that AT grains of pure AT and AT-M30 were completely decomposed to fine ¡-Al 2 O 3 and TiO 2 with loose structure, as shown in Figs. 3(b) and 3(d), which have been proved by the XRD results in Fig.…”

Section: +mentioning

confidence: 98%

“…However, grain size of AT decreased from 58¯m (AT-Fe20) to 12¯m (AT-M40-Fe20 and AT-M50-Fe20), which can be attributed to restraining of mullite between the grain boundary of AT during the synthesis process. 16) At the same time most of these in-situ synthesized whiskers, formed interlocking structure in the large pores (as shown in Fig. 7), which can improve the strength of the porous ceramic.…”

Section: )18)mentioning

confidence: 99%

Stability, microstructure and mechanical properties of (Al,Fe)<sub>2</sub>TiO<sub>5</sub> porous ceramic reinforced by in-situ mullite

Zhao

Cui

et al. 2015

J. Ceram. Soc. Japan

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Stabilized Al 2 TiO 5 -based porous ceramics reinforced by in-situ formed mullite whiskers were fabricated by reaction sintering method. The thermal stability, microstructure, mechanical properties and pore size distribution of these porous ceramics were examined. Results show that with the substitution of Al 2 O 3 by Fe 2 O 3 , the thermal decomposition of Al 2 TiO 5 is well suppressed, and with the increasing amount of in-situ formed mullite, the mechanical properties are improved obviously under the similar apparent porosity. Finally, a stabilized Al 2 TiO 5 -mullite porous ceramic with compressive strength of 51.8 MPa, flexural strength of 14.6 MPa and apparent porosity of about 42% was obtained. It had a bimodal pore size distribution and the pore diameter was in the range of 0.1 to 20¯m.

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“…After sintering, glassy or partially crystallized phases are present at grain boundaries. Sintered ceramics like silicon nitride contain glassy or partially crystallised secondary phase at grain boundaries, where it forms a thin glassy film [20]. The secondary phase affects the deformation in three ways: it may act as a lubricant (viscous flow creep), improve material diffusion (solution-precipitation creep), it provides the location for the nucleation and growth of cavities during the deformation process (creep by cavitation).…”

Section: Mechanisms Of Creep In Ceramicsmentioning

confidence: 99%

Review: creep of fibre-reinforced ceramic matrix composites

Lamon

2019

International Materials Reviews

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The content of the review covers, first, generalities on creep. Then, the creep of ceramics and fibres, that are key constituents of fibre-reinforced ceramic matrix composites (CMCs) are addressed. The general features of ceramic matrix composites that may influence the creep behaviour and creep rupture are discussed. Emphasis is placed on microstructure-property relationships and load sharing between fibres and matrix that are critical for CMCs. Then, creep tests and the creep behaviour of various types of fibre-reinforced composites are presented. Mechanisms and models are discussed. The influence of various factors including composite structure, constituent properties (matrix and fibres), interfacial properties and environmental conditions are examined. The paper focuses on non-oxide composites like SiC/SiC that received much attention during the last three decades. Creep of oxide ceramics, fibres and composites are addressed more briefly.

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High Temperature Mechanical Behavior of Silicon Nitride Ceramics

Cited by 5 publications

References 0 publications

Tribological behavior comparisons of high chromium stainless and mild steels against high-speed steel and ceramics at high temperatures

Tribological behavior comparisons of high chromium stainless and mild steels against high-speed steel and ceramics at high temperatures

Stability, microstructure and mechanical properties of (Al,Fe)<sub>2</sub>TiO<sub>5</sub> porous ceramic reinforced by in-situ mullite

Review: creep of fibre-reinforced ceramic matrix composites

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