Some factors influencing the formation of reaction-bonded silicon nitride

Pigeon, R. G.; Varma, Arvind; Miller, A. E.

doi:10.1007/bf00595765

Cited by 75 publications

(67 citation statements)

References 57 publications

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“…In the case of α-Si 3 N 4 which exists either in the form of whiskers or matte, gaseous Si reacts with molecular nitrogen [18]. The second path for α-Si 3 N 4 formation is the reaction of SiO vapor with nitrogen [5]. These reactions are shown in Reactions (1) and (2).…”

Section: Nitriding Reactions and Rbsn Foam Propertiesmentioning

confidence: 96%

“…The figure also shows that a short Ar-sintering step also slightly increases the strength under both N 2 and N 2 -H 2 atmospheres. It has been reported that the presence of H 2 improves the strength of "dense" RBSN ceramics [5]. However, Fig.…”

Section: Foam Strength Versus Porositymentioning

confidence: 99%

“…Among the engineering ceramic materials, Si 3 N 4 foams have not received sufficient attention due to the difficulties of working with Si 3 N 4 powder and also the high cost of the material [4]. It must be mentioned that working with Si 3 N 4 powder as the starting material requires dealing with its very high sintering temperature and also large linear shrinkage (15-20%) which makes costly post-sintering machining steps necessary [5]. Si 3 N 4 suspensions have also shown poor and inconsistent rheological behavior which is a major issue from the industrial point of view [6,7].…”

Section: Introductionmentioning

confidence: 99%

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Reaction bonded silicon nitride foams: The influence of iron disilicide on microstructure and mechanical strength

Alem

Pugh

Drew

2015

Ceramics International

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Section: Nitriding Reactions and Rbsn Foam Propertiesmentioning

confidence: 96%

Section: Foam Strength Versus Porositymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Reaction bonded silicon nitride foams: The influence of iron disilicide on microstructure and mechanical strength

Alem

Pugh

Drew

2015

Ceramics International

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“…10) The authors have recently reported on the effect of ZrO2 on the nitridation of silicon. 16) However that work used only fine silicon powder and therefore the enhancing effect of ZrO2 has not been clarified for materials that use different particle sizes of silicon.…”

Section: )-7)mentioning

confidence: 99%

Influence of zirconia addition on reaction bonded silicon nitride produced from various silicon particle sizes

Hyuga

Yoshida

Kondo

et al. 2008

J. Ceram. Soc. Japan

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Reaction bonded silicon nitride ceramics have been produced from Si powders of different particle size and both with and without zirconia as a nitride catalyzing element. The effect of the ZrO2 on the nitridation rate of the specimens was studied as a function of temperature, and the mechanism of enhanced nitridation was discussed. At all temperatures, the degree of nitridation of specimens sintered with ZrO2 was higher than those without additions for all particle sizes. In the case of nitridation of specimens produced without ZrO2, the degree of nitridation was dependent on particle size, with larger sizes resulting in less nitridation. For specimens with ZrO2 the finest powder also showed highest transformation, but there was no difference in the degree of nitridation of medium and coarse powders. It was found that during heating of the specimens the ZrO2 was transformed to ZrN at low temperature and enhanced nitridation is considered to be due to this phase re-converting to ZrO2 at higher temperature and thereby supplying nitrogen to the interior of the specimens. At lower temperatures, the strength of the specimens with ZrO2 were higher than those without, attributed to the enhanced nitridation. However, comparing strengths of fully nitrided specimens, those with ZrO2 were lower than those without, thought to be due to the presence of ZrO2 particles disrupting the connectivity of adjacent silicon nitride grains.

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“…Several researches also have been done focusing the catalytic effect of a single additive on the nitridiation. 35)40) However, little research has been done on silicon mixture containing sintering additives and/or other components. 29),33),41),42) Diluents, such as Si 3 N 4 , contribute not only to control of the exothermal nitriding reaction, but also they increase strength due to the creation of an agglomeration-free homogenized microstructure.…”

Section: Introductionmentioning

confidence: 99%

The catalytic role of additive components for the nitridation of silicon/additive mixture

Kim

Park

Kim

et al. 2016

J. Ceram. Soc. Japan

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The nitriding behavior of silicon/additives mixture with varied composition was investigated by focusing on the catalytic effect of sintering additives (Y 2 O 3 and Al 2 O 3 ) and diluents (Si 3 N 4 ). While sintering additives have originally been mixed to form a liquid phase to promote both densification and grain growth during post-sintering, it was revealed that the addition of Y 2 O 3 enhances the nitriding reaction by eliminating the SiO 2 and Si 3 N 4 layer on the surface of silicon particles. Further, a synergistic effect resulting in an increased nitridation was verified by concurrent addition of sintering additives and diluents. The contribution of each component of the compact to the promoted nitriding reaction was elucidated in quasi in-situ manner by the combination of phase analysis and thermogravimetric analysis.

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Some factors influencing the formation of reaction-bonded silicon nitride

Cited by 75 publications

References 57 publications

Reaction bonded silicon nitride foams: The influence of iron disilicide on microstructure and mechanical strength

Reaction bonded silicon nitride foams: The influence of iron disilicide on microstructure and mechanical strength

Influence of zirconia addition on reaction bonded silicon nitride produced from various silicon particle sizes

The catalytic role of additive components for the nitridation of silicon/additive mixture

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