THE 500-DEGREES-C ISOTHERMAL SECTION OF THE PHASE-DIAGRAM OF THE TERNARY HO-FE-NB SYSTEM

Authors
ZHUANG YH QIN W ZHOU HY
Citation
Yh. Zhuang et al., THE 500-DEGREES-C ISOTHERMAL SECTION OF THE PHASE-DIAGRAM OF THE TERNARY HO-FE-NB SYSTEM, Journal of alloys and compounds, 248(1-2), 1997, pp. 206-208
Citations number
13
Categorie Soggetti
Chemistry Physical","Metallurgy & Metallurigical Engineering","Material Science
Journal title
Journal of alloys and compounds → ACNP
ISSN journal
09258388
Volume
248
Issue
1-2
Year of publication
1997
Pages
206 - 208
Database
ISI
SICI code
0925-8388(1997)248:1-2<206:T5ISOT>2.0.ZU;2-Z
Abstract
The 500 degrees C isothermal section of the Ho-Fe-Nb system was invest igated by X-ray powder diffraction, differential thermal microanalysis and electron-probe microanalysis techniques. It consists of 10 single -phase regions, 18 two-phase regions and 9 three-phase regions. At 500 degrees C, the maximum solubilities of Nb in Ho2Fe17 and Ho in Fe2Nb and FeNb are about 2.0, 2.0 and 3.0 at.% respectively. In the Fe-Nb bi nary system, the composition ranges of the phases beta(Fe2Nb) and gamm a(FeNb) were determined as 32.0 to 41.0 at.% Nb and 48.0 to 53.0 at.% Nb respectively. The other compounds, including the tetragonal compoun d HoFe11Nb, have no observable homogeneity ranges.