Spark Plasma Sintering of high-density fine-grained Y2.5 Nd0.5Al5O12 + SiC composite ceramics

被引：17
|
作者：
Golovkina, L. S. [1 ]
Orlova, A. I. [1 ]
Chuvil'deev, V. N. [1 ]
Boldin, M. S. [1 ]
Lantcev, E. A. [1 ]
Nokhrin, A. V. [1 ]
Sakharov, N. V. [1 ]
Zelenov, A. Yu. [1 ]
机构：
[1] Lobachevsky State Univ Nizhny Novgorod, Nizhnii Novgorod 603950, Russia
来源：
MATERIALS RESEARCH BULLETIN | 2018年 / 103卷
基金：
俄罗斯科学基金会;
关键词：
Ceramic composites; Garnet; Sintering; Microstructure; Grain boundaries; Diffusion; YTTRIUM-ALUMINUM-GARNET; FERRITE GARNETS; IRRADIATION; ACTINIDES; EXPANSION; STABILITY; CARBIDE; POWDERS; ND;
D O I：
10.1016/j.materresbull.2018.03.042
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Spark Plasma Sintering (SPS) has been used to produce samples of fine-grained composites Y-2.5 Nd0.5Al5O12 + x wt.% alpha-SiC (x = 1020) with similar to 98-99% density. The microstructure of the composites has been studied, as well as the impact of alpha-SiC particles on the mechanical properties and kinetics of composite sintering. The introduction of the alpha-SiC part has been demonstrated to form a more fine-grained structure and under the given SPS conditions change the sintering mechanism in ceramics. The study has also demonstrated that introduction of alpha-SiC particles into garnet results in formation of internal stress fields, which, in turn, leads to a decrease in the activation energy of sintering of fine-grained composites at high temperatures.
引用
收藏
页码：211 / 215
页数：5
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