Co-Ni-Zn Ferrites Fabricated by Spark Plasma Sintering

被引：5

作者：

Balla, Andrea ^{[1
]}

Moczo, Janos ^{[2
]}

Karoly, Zoltan ^{[2
]}

机构：

[1] Obuda Univ, Doctoral Sch Mat Sci & Technol, Becsi Str 96-B, H-1034 Budapest, Hungary

[2] Hungarian Acad Sci, Res Ctr Nat Sci, Magyar Tudosok Krt 2, H-1117 Budapest, Hungary

来源：

PERIODICA POLYTECHNICA-CHEMICAL ENGINEERING | 2020年 / 64卷 / 02期

关键词：

ferrites; morphology; Spark Plasma Sintering; CONSOLIDATION; PERMEABILITY; PRESSURE;

D O I：

10.3311/PPch.14710

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Ni0.4Co0.2Zn0.4Fe2O4 spinel ferrites have been synthesized by precipitation method from an aqueous solution and bulk samples were fabricated by Spark Plasma Sintering (SPS) to investigate the microstructure and the mechanical properties. Although SPS is considered as a rapid compaction technique, its application is uncommon for ferrites due to reactions occurring between the graphite die and the ferrite powder at elevated temperature. In our tests this problem was circumvented by an alumina film applied on the die. We found that both chemical and phase composition could be retained in the sintered specimens after sintering. In addition, they exhibited improved mechanical properties in terms of hardness (10 GPa) and fracture toughness (2.7 MPa . m(-1/2)) as compared to conventionally sintered reference samples.

引用

页码：265 / 270

页数：6

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