Oxidation and crystallization of Zr-based bulk metallic glass due to machining

被引：84

作者：

Bakkal, M

Liu, CT

Watkins, TR

Scattergood, RO

Shih, AJ ^{[1
]}

机构：

[1] N Carolina State Univ, Dept Mech & Aerosp Engn, Raleigh, NC 27695 USA

[2] Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA

[3] N Carolina State Univ, Dept Mat Sci & Engn, Raleigh, NC 27695 USA

[4] Univ Michigan, Dept Mech Engn, Ann Arbor, MI 48109 USA

来源：

INTERMETALLICS | 2004年 / 12卷 / 02期

关键词：

metallic glasses; oxidation; machining; X-ray diffraction; scanning;

D O I：

10.1016/j.intermet.2003.09.017

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Bulk metallic glass was subjected to extreme deformation conditions during machining operation. The flash temperature, oxidation and crystallization within chips from a Zr-based bulk metallic glass were investigated. A near-infrared spectrometer was used to capture the light emission from the tool-chip interface allowing the calculation of the temperature. Very high temperatures in the 2400-2700 K range were observed and associated with the light emission and oxidation in the chips. X-ray diffraction analysis revealed oxidation of chips machined at high cutting speeds. Optical micrographs of polished and etched chip cross-sections showed a dendritic pattern due to crystallization. Using a field emission gun SEM, amorphous and crystalline regions were analyzed. This study demonstrates the oxidation and crystallization of bulk metallic glass during machining. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：195 / 204

页数：10

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