Investigation of the Structure of Si3N4-Based Ceramic with Al2O3 and Y2O3 Additives

Krasilnikov, V. V.; Сирота, В. В.; Ivanov, A. N.; Kozlova, L. N.; Lukyanova, O.A.; Ivanisenko, V. V.

doi:10.1007/s10717-014-9606-1

Cited by 13 publications

(5 citation statements)

References 7 publications

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“…4 ). However, the influence of additives on the microstructure of similar material obtained by free sintering was described in our earlier work [ 14 – 17 ]. The negative effect of magnesium oxide on the structure of pressureless sintered ceramics was also shown earlier [ 17 ].…”

Section: Resultsmentioning

confidence: 99%

Microstructure of Spark Plasma-Sintered Silicon Nitride Ceramics

Lukianova

Novikov

Parkhomenko³

et al. 2017

Nanoscale Res Lett

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The microstructure and phase composition of the high-content Al2O3-Y2O3-doped spark plasma-sintered silicon nitride were investigated. Fully dense silicon nitride ceramics with a typical α-Si3N4 equiaxed structure with average grain size from 200 to 530 nm, high elastic modulus of 288 GPa, and high hardness of 2038 HV were spark plasma sintered (SPSed) at 1550 °C. Silicon nitride with elongated β-Si3N4 grains, higher hardness of 1800 HV, density of 3.25 g/cm3, and Young’s modulus 300 GPa SPSed at 1650 °C was also reviewed.

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Section: Resultsmentioning

confidence: 99%

Microstructure of Spark Plasma-Sintered Silicon Nitride Ceramics

Lukianova

Novikov

Parkhomenko³

et al. 2017

Nanoscale Res Lett

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“…Fine α -silicon nitride powder (92 wt%) was mixed with 2 wt% selfmade MgO and 6 wt% Al 2 O 3 (A16 SG, 600 nm) using vibratory disc mill Retsch RS-200. Other details were reported previously [21][22][23][24][25][26][27][28]. A new innovative technology has been used to produce a nanoscale highpurity powder of magnesium oxide.…”

Section: Methodsmentioning

confidence: 99%

The effect of Al2O3-MgO additives on the microstructure of spark plasma sintered silicon nitride

Lukianova

Ivanov

2018

Ceramics International

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It was shown that spark plasma sintered silicon nitride with a high content of Al 2 O 3 and MgO consists of α and β silicon nitride, the main phase being α silicon nitride. The increase in the sintering temperature did not lead to significant changes in the phase composition as occurs in silicon nitride added with Al 2 O 3-Y 2 O 3. It was found that increasing in SPS temperature above 1650°C leads to an insignificant increase in the density. A complex shaped equiaxed grain microstructure was shown in both cases. However, doping with aluminum and yttrium oxides allows obtaining an elongated grain microstructure. The Hall-Petch effect was observed for the microhardness of the investigated SPSed silicon nitride. The microhardness of the described ceramics was rather high and more than 1900 HV compared to the pressureless sintered at 1800°C silicon nitride with the microhardness equal to 1511 HV.

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“…Si 3 N 4 -based ceramic composites have the characteristics of high strength, good fatigue toughness, wear-resistance and oxidation resistance, low dielectric constant, and excellent mechanical and mechanical properties. They are favored by researchers in aerospace, machinery, and other fields [38][39][40][41][42][43][44][45].…”

Section: Preparation Of Si3n4 Matrix Composites By In Situ Synthesismentioning

confidence: 99%

Study on the preparation method of in-situ synthesized whisker toughened ceramic materials

Qiao

Liu²,

Zhang³

et al. 2022

International Conference on Advanced Sensing and Smart Manufacturing (ASSM 2022)

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The advantages and disadvantages of different in-situ whisker synthesis processes are analyzed. The latest research progress on the in-situ synthesis of whisker toughening Al 2 O 3 -based and Si 3 N 4 -based ceramic tool materials are reviewed, and corresponding solutions to the problems existing in in-situ synthesis are proposed. It is believed that different in-situ synthesis processes have their own characteristics, and reasonable control of process conditions can obtain high-quality whiskers, thereby improving the comprehensive mechanical properties of ceramic tool materials.

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Investigation of the Structure of Si3N4-Based Ceramic with Al2O3 and Y2O3 Additives

Cited by 13 publications

References 7 publications

Microstructure of Spark Plasma-Sintered Silicon Nitride Ceramics

Microstructure of Spark Plasma-Sintered Silicon Nitride Ceramics

The effect of Al2O3-MgO additives on the microstructure of spark plasma sintered silicon nitride

Study on the preparation method of in-situ synthesized whisker toughened ceramic materials

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