Cementite-iron nanocomposite

被引：50

作者：

Goodwin, TJ ^{[1
]}

Yoo, SH ^{[1
]}

Matteazzi, P ^{[1
]}

Groza, JR ^{[1
]}

机构：

[1] DIPARTIMENTO SCI & TECNOL CHIM,I-33100 UDINE,ITALY

来源：

NANOSTRUCTURED MATERIALS | 1997年 / 8卷 / 05期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0965-9773(97)00194-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Nanocomposites Fe-85 vol.% Fe3C were prepared by mechanosynthesis (MS) of elemental Fe and graphite powders. The crystallite size in the MS powder was about 7 nm for Fe3C and about 8 nm for Fe. These powders were densified by afield assisted sintering process. Near full density was achieved by consolidation at 450 degrees C for 3 minutes in air under a pressure of 63 MPa. A final grain size of 45 nm was retained. This small grain size is responsible for significantly enhanced mechanical properties. Hardness values reach 10.8 GPa. Conversely, physical properties (i.e., magnetic) are not altered by the fine grain size achieved in this cementite-based nanocomposite. (C) 1997 Acta Metallurgica Inc.

引用

页码：559 / 566

页数：8

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