Effect of high pressure on microstructure and mechanical and optical properties of nano-structured MgAl2O4 spinel fabricated by High Pressure Spark Plasma Sintering

IF 5.8 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Journal of The European Ceramic Society Pub Date : 2025-05-29 DOI:10.1016/j.jeurceramsoc.2025.117579

Sandrine Cottrino , Thomas Gaudisson , Thierry Douillard , Nicholas Blanchard , Sylvain Meille , Laurent Gremillard , Matthieu Mercury , Sylvie Le Floch

引用次数: 0

Abstract

Nano-structured MgAl₂O₄ spinel ceramics were fabricated by High-Pressure Spark Plasma Sintering (HP-SPS) up to 5 GPa. High-pressure compaction creates green bodies with fine pores and improved density, enhancing the sintering process. Applying a pressure of 1.5 GPa reduces sintering temperatures by 500 °C, resulting in dense, transparent ceramics without grain coarsening. The ceramics show increased hardness due to their nano-scale grain structure, though some optical losses at shorter wavelengths are observed due to stress-induced crystalline defects.

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高压对高压火花等离子烧结MgAl2O4尖晶石微观结构及力学光学性能的影响

采用高压放电等离子烧结（HP-SPS）法制备了MgAl₂O₄尖晶石纳米陶瓷，烧结温度高达5 GPa。高压压实产生细孔坯体，提高密度，提高烧结工艺。施加1.5 GPa的压力可使烧结温度降低500 °C，从而得到致密、透明的陶瓷，而不会使晶粒变粗。由于其纳米级的晶粒结构，陶瓷显示出更高的硬度，尽管由于应力诱导的晶体缺陷，在较短波长处观察到一些光学损失。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of The European Ceramic Society 工程技术-材料科学：硅酸盐

CiteScore

10.70

自引率

12.30%

发文量

863

审稿时长

35 days

期刊介绍： The Journal of the European Ceramic Society publishes the results of original research and reviews relating to ceramic materials. Papers of either an experimental or theoretical character will be welcomed on a fully international basis. The emphasis is on novel generic science concerning the relationships between processing, microstructure and properties of polycrystalline ceramics consolidated at high temperature. Papers may relate to any of the conventional categories of ceramic: structural, functional, traditional or composite. The central objective is to sustain a high standard of research quality by means of appropriate reviewing procedures.