Relationships between processing, microstructure and properties of dense and reaction-bonded silicon nitride

Ziegler, G.; Heinrich, Jürgen G.; Wötting, G.

doi:10.1007/bf01161167

Cited by 753 publications

(346 citation statements)

References 83 publications

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“…Silicon nitride (Si 3 N 4 ) is one of the most intensively studied ceramic materials and is suitable for a variety of structural applications such as automotive engine parts, heat exchangers, pump seal parts, ball bearings, cutting tools and ceramic armor due to its low bulk density, excellent mechanical properties at elevated temperatures, high resistance to thermal shock and chemical attack, excellent creep resistance and good tribological and wear properties [1,2].…”

Section: Introductionmentioning

confidence: 99%

Textured silicon nitride: processing and anisotropic properties

Zhu

Sakka

2008

Science and Technology of Advanced Materials

158

104

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Textured silicon nitride (Si 3 N 4 ) has been intensively studied over the past 15 years because of its use for achieving its superthermal and mechanical properties. In this review we present the fundamental aspects of the processing and anisotropic properties of textured Si 3 N 4 , with emphasis on the anisotropic and abnormal grain growth of β-Si 3 N 4 , texture structure and texture analysis, processing methods and anisotropic properties. On the basis of the texturing mechanisms, the processing methods described in this article have been classified into two types: hot-working (HW) and templated grain growth (TGG). The HW method includes the hot-pressing, hot-forging and sinter-forging techniques, and the TGG method includes the cold-pressing, extrusion, tape-casting and strong magnetic field alignment techniques for β-Si 3 N 4 seed crystals. Each processing technique is thoroughly discussed in terms of theoretical models and experimental data, including the texturing mechanisms and the factors affecting texture development. Also, methods of synthesizing the rodlike β-Si 3 N 4 single crystals are presented. Various anisotropic properties of textured Si 3 N 4 and their origins are thoroughly described and discussed, such as hardness, elastic modulus, bending strength, fracture toughness, fracture energy, creep behavior, tribological and wear behavior, erosion behavior, contact damage behavior and thermal conductivity. Models are analyzed to determine the thermal anisotropy by considering the intrinsic thermal anisotropy, degree of orientation and various microstructure factors. Textured porous Si 3 N 4 with a unique microstructure composed of oriented elongated β-Si 3 N 4 and anisotropic pores is also described for the first time, with emphasis on its unique mechanical and thermal-mechanical properties. Moreover, as an important related material, textured α-Sialon is also reviewed, because the presence of elongated α-Sialon grains allows the production of textured α-Sialon using the same methods as those used for textured β-Si 3 N 4 and β-Sialon.

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Section: Introductionmentioning

confidence: 99%

Textured silicon nitride: processing and anisotropic properties

Zhu

Sakka

2008

Science and Technology of Advanced Materials

158

104

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“…The -sialon content has a maximum value (86% in Fig. 2(c)) and the density achieved a maximum of 2.225 g/cm 3 simultaneously at 1 wt% Y 2 O 3 content (Fig. 3(c)), suggesting that the addition of 1 wt% Y 2 O 3 to the precursor composition is beneficial to promote sintering.…”

Section: Effect Of Additional Yttriamentioning

confidence: 94%

“…2 3 for β-sialon [13]) and therefore an increase in the Al 2 O 3 : -sialon ratio in the product material would be expected to result in a material with higher bulk density.…”

Section: Effect Of Additional Al 2 Omentioning

confidence: 99%

“…However, the introduction of such an additive gives rise to residual glassy and/or crystalline intergranular phases [2][3][4] as a result of the formation of a liquid phase during sintering. As a rule, the presence of such secondary 3 phases has a detrimental effect on the high temperature properties of the ceramic [5].…”

Section: Introductionmentioning

confidence: 99%

“…It is well known that pressureless sintering of dense Si 3 N 4 -based ceramics requires the use of a sintering additive [2][3][4][5][6][7][8][9][10][11][12]. However, the introduction of such an additive gives rise to residual glassy and/or crystalline intergranular phases [2][3][4] as a result of the formation of a liquid phase during sintering.…”

Section: Introductionmentioning

confidence: 99%

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The effect of precursor composition and sintering additives on the formation of β-sialon from Al, Si and Al2O3 powders

Ewing¹,

Yang

2011

Ceramics International

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The Nitridation of a Silicon Powder Studied by XPS and X-ray-induced AES

Wang

Wittberg

1996

Surf. Interface Anal.

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Relationships between processing, microstructure and properties of dense and reaction-bonded silicon nitride

Cited by 753 publications

References 83 publications

Textured silicon nitride: processing and anisotropic properties

Textured silicon nitride: processing and anisotropic properties

The effect of precursor composition and sintering additives on the formation of β-sialon from Al, Si and Al2O3 powders

The Nitridation of a Silicon Powder Studied by XPS and X-ray-induced AES

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