Thermodynamics of the incongruently subliming niobium-tin system

Journal Article · Fri Jan 01 04:00:00 EST 1982 · High Temp. Sci.; (United States)

OSTI ID:5512420

Schiffman, R A; Bailey, D M

The niobium-tin system was investigated in the temperature range 1261-2076 K by measurement of tin vapor pressures with a simultaneous weight loss-mass-spectrometric technique. For the reaction Nb + 1/3Sn ..-->.. NbSn/sub 1///sub 3/, ..delta..H/sub f//sup 298/ was found to be -21.59 kJ/mol. The heat of solution of tin in niobium was determined as a function of composition. The temperature-composition diagram for the niobium-tin system above 1200/sup 0/C was constructed. The Nb/sub 3/Sn phase has a narrow homogeneity range from 25 to 28 at% tin below 1600 K that broadens to include 18 at% tin at 2076 K.

• Research Organization: Ames Lab., IA
• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 5512420
• Journal Information: High Temp. Sci.; (United States), Journal Name: High Temp. Sci.; (United States) Vol. 15:2/3; ISSN HITSA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
DIAGRAMS
ENTHALPY
FLUID FLOW
GAS FLOW
KNUDSEN FLOW
MASS SPECTROSCOPY
NIOBIUM ALLOYS
NIOBIUM BASE ALLOYS
PHASE DIAGRAMS
PHYSICAL PROPERTIES
SOLUTION HEAT
SPECTROSCOPY
THERMODYNAMIC PROPERTIES
THERMODYNAMICS
TIN ALLOYS
VAPOR PRESSURE
VERY HIGH TEMPERATURE