Influence of Phase Composition on Sintered Microstructure of Combustion Synthesized Oxides

4区材料科学 Q2 Engineering

Advances in Materials Science and Engineering Pub Date : 2007-09-26 DOI:10.1155/2007/91376

I. Ganesh, J. Ferreira

引用次数: 2

Abstract

The effects of powders synthesis methods (urea-combustion synthesis (CS) and conventional solid-state (SS) reaction) on the sintering ability, microstructural features, and mechanical properties of Al2O3, MgAl2O4 spinel, and 20 wt.% ZrO2–MgAl2O4 upon sintering at 1625C∘ were investigated. X-ray diffraction (XRD), scanning electron microscopy (SEM), relative density (RD), apparent porosity and water absorption capacity, hardness, fracture toughness, and three-point bend test studies revealed the superior sintering ability of CS ZrO2-MgAl2O4 composite powder as compared with one prepared by SS reaction. In contrast, single-phase powders obtained by SS reaction exhibit superior sintering ability over CS synthesized ones. The reasons for differences observed are discussed along this paper.

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相组成对燃烧合成氧化物烧结微观结构的影响

研究了粉末合成方法(尿素燃烧合成(CS)和常规固相(SS)反应)对Al2O3、MgAl2O4尖晶石和20wt . m2o4尖晶石烧结性能、显微组织特征和力学性能的影响。研究了在1625°c下烧结时的ZrO2-MgAl2O4。x射线衍射(XRD)、扫描电镜(SEM)、相对密度(RD)、表观孔隙率和吸水率、硬度、断裂韧性和三点弯曲试验研究表明，CS ZrO2-MgAl2O4复合粉体的烧结性能优于SS反应制备的粉体。相比之下，SS反应制得的单相粉末的烧结性能优于CS合成的粉末。本文还讨论了所观察到的差异的原因。

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

Advances in Materials Science and Engineering Materials Science-General Materials Science

CiteScore

3.30

自引率

0.00%

发文量

审稿时长

4-8 weeks

期刊介绍： Advances in Materials Science and Engineering is a broad scope journal that publishes articles in all areas of materials science and engineering including, but not limited to: -Chemistry and fundamental properties of matter -Material synthesis, fabrication, manufacture, and processing -Magnetic, electrical, thermal, and optical properties of materials -Strength, durability, and mechanical behaviour of materials -Consideration of materials in structural design, modelling, and engineering -Green and renewable materials, and consideration of materials’ life cycles -Materials in specialist applications (such as medicine, energy, aerospace, and nanotechnology)