Supersaturation and optical properties of metal-rich Zr-O and Zr-N liquids

被引：8

作者：

Krishnan, S ^{[1
]}

Weber, JKR ^{[1
]}

Anderson, CD ^{[1
]}

Nordine, PC ^{[1
]}

Morton, CT ^{[1
]}

Hofmeister, WH ^{[1
]}

Bayuzick, RJ ^{[1
]}

机构：

[1] VANDERBILT UNIV,NASHVILLE,TN 37235

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1996年 / 219卷 / 1-2期

基金：

美国国家航空航天局;

关键词：

supersaturation; optical properties; zirconium;

D O I：

10.1016/S0921-5093(96)10374-9

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effects of oxygen and nitrogen additions on the optical properties of pure liquid zirconium were investigated under containerless conditions using rotating analyzer ellipsometry. Liquid zirconium was electromagnetically levitated and melted, and metered flows of oxygen and nitrogen were added to the melt in separate experiments. The optical constants (n and k) and the normal spectral emissivity (epsilon(lambda)) of the liquid at lambda = 633 nm were measured over the duration of the experiments. The measured values of n and k decreased and epsilon(lambda) increased with the O and N concentrations for the single-phase liquids. Metastable Zr-O solutions with 135% of the liquidus O-atom concentration were achieved at a temperature of 2260 K. Precipitation of a solid phase from the Zr-N liquid at 2290 K occurred at a concentration of 7.6 at.% N. Based on these results, a new method using in situ ellipsometric measurements is described for the accurate determination of liquidus concentrations and temperatures. Dissolved oxygen and nitrogen were found to influence the optical properties of liquid zirconium in a manner proportional to their respective valences.

引用

页码：21 / 25

页数：5

共 5 条

[1] OPTICAL-PROPERTIES OF LIQUID ALUMINUM IN THE ENERGY-RANGE 1.2-3.5 EV [J].