N‐SiC Side Lining – Variations of Materials Structure

Yurkov, A. L.; Danilova, Oxana; Dovgal, Alexey

doi:10.1002/9781118888438.ch208

Cited by 5 publications

(15 citation statements)

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“…The current paper covers the investigations of the author, together with co-authors [6][7][8]; some of the information was published earlier, some information is not published yet.…”

Section: Methodsmentioning

confidence: 99%

“…The shape of α-Si 3 N 4 particles is elongated with needle-like crystals, having L/d > 10-20 (Figure 3b). Our experimental data (Table 2) show that the α/β ratios of silicon nitride, synthesized in lab conditions in a static atmosphere and in industrial conditions [6][7][8] in a flowing atmosphere of nitrogen, differ considerably. Large amounts of α-needle-like crystals of silicon nitride are present in materials produced in a flowing atmosphere.…”

Section: On the Ratio Of α-Si3n4 To β-Si3n4 Modifications In Si3n4-si...mentioning

confidence: 96%

Section: On the Ratio Of α-Si3n4 To β-Si3n4 Modifications In Si3n4-si...mentioning

confidence: 99%

“…The weight effect of the reaction is [7] ∆m/m = m(Si 3 N 4 )/3m(Si) = 1.67 (4) The positive value of volume effect of Reaction (1) means that the reactants occupy more space than the starting powders. Reaction (1) proceeds with positive volume effect and positive weight effect [7]. This means that 1 mole of appearing silicon nitride occupies a 20% larger volume than the 3 initial moles of silicon that means the diminishing of porosity and giving strength.…”

Section: On the Ratio Of α-Si3n4 To β-Si3n4 Modifications In Si3n4-si...mentioning

confidence: 99%

“…The mechanical properties of coarse-grained Si 3 N 4 -SiC compositions are reported in [6,7]. There is no direct certainty whether Si 3 N 4 -SiC materials may be called brittle ceramic materials or composite materials from the viewpoint of mechanics and strength.…”

Section: Introductionmentioning

confidence: 99%

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Silicon Carbide–Silicon Nitride Refractory Materials: Part 1 Materials Science and Processing

Yurkov

2023

Processes

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Silicon carbide and silicon nitride materials were intensively studied in the end of the past century, yet some aspects of its physical chemistry require investigation. The strength characteristics of Si3N4-SiC refractories are moderate; however, these materials sometimes demonstrate “stress–strain” behavior, more typical for composite materials than for the brittle ceramics. These materials may be considered to be ceramic composites because they consist of big grains of silicon carbide surrounded by small grains of silicon nitride, with strict interfaces between them. There is no direct certainty whether Si3N4-SiC compositions may be called composite materials or brittle ceramic materials from the viewpoint of mechanics and strength. The balance of α/β modifications of silicon nitride in Si3N4-SiC composite material and, the occurrence and the role of silicon oxynitride Si2ON2 are also a matter of scientific interest in processing of Si3N4-SiC composite material. The same may be said about the particles of silicon nitride between the grains of silicon carbide—there is no direct understanding whether silicon nitride grains will be isometric grains or needle-like crystals.

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“…The current paper covers the investigations of the author, together with co-authors [6][7][8]; some of the information was published earlier, some information is not published yet.…”

Section: Methodsmentioning

confidence: 99%

Section: On the Ratio Of α-Si3n4 To β-Si3n4 Modifications In Si3n4-si...mentioning

confidence: 96%