Comparative Analysis of the Structure and Properties of Alumina Ceramics Obtained by Conventional Pressureless Sintering and Spark Plasma Sintering

被引：0

作者：

Boldin, M. S. ^{[1
]}

Tikhonova, D. A. ^{[1
]}

Borkova, A. D. ^{[1
]}

Udachin, S. I. ^{[1
]}

Lantsev, E. A. ^{[1
]}

Voronin, A. V. ^{[1
]}

Murashov, A. A. ^{[1
]}

Belkin, O. A. ^{[1
]}

Nokhrin, A. V. ^{[1
]}

Chuvil'deev, V. N. ^{[1
]}

机构：

[1] Natl Res Lobachevsky State Univ Nizhny Novgorod, Nizhnii Novgorod 603022, Russia

来源：

INORGANIC MATERIALS-APPLIED RESEARCH | 2025年 / 16卷 / 03期

基金：

俄罗斯科学基金会;

关键词：

alumina; ceramics; sintering; density; structure; hardness; MECHANICAL-PROPERTIES; SPS; MICROSTRUCTURES;

D O I：

10.1134/S2075113325700492

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of the initial size of alumina particles on the density, microstructure, hardness, and fracture toughness of ceramics obtained by conventional and spark plasma sintering (SPS) has been studied. We studied ceramics obtained from commercial Al2O3 powders with an initial particle size of 40 to 50 nm, 0.2 mu m, and 1 mu m and domestic fine powders with an initial particle size of 0.2 to 3 mm, and Al2O3 + 0.25 vol % MgO and Al2O3 + 10 vol % ZrO2. It is shown that the density of alumina ceramics nonmonotonically depends on the initial size of Al2O3 powder particles. It has been established that an increase in the grain size leads to a nonmonotonic change in the hardness of alumina ceramics. It has been established that the addition of 0.25 vol % MgO accelerates the sintering of alumina. The addition of 10 vol % ZrO2 makes it possible to provide an optimal combination of hardness and fracture toughness. It is shown that fine-grained ceramics obtained by the SPS method have a higher hardness. It has been suggested that SPS of submicron alumina powders with an amorphous layer on the surface, additionally stabilized by zirconia particles, is promising for further increasing the hardness of alumina ceramics.

引用

页码：649 / 661

页数：13

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