Environmental effects on ductile-phase toughening in Nb sub 5 Si sub 3 Nb composites

Journal Article · Sat Aug 01 04:00:00 EDT 1992 · JOM (Journal of the Minerals, Metals and Materials Society); (United States)

DOI:https://doi.org/10.1007/BF03222301· OSTI ID:7088859

Rigney, J D; Singh, P M; Lewandowski, J L

A variety of materials have been toughened via the addition of a ductile phase. Brittle silicide intermetallics such as Nb{sub 5}Si{sub 3} have been significantly toughened by niobium particles incorporated during in-situ processing techniques. In this paper toughness tests conducted on Nb{sub 5}Si{sub 3}-Nb were monitored in a scanning electron microscope to view the process of toughening provided by the niobium particles. In particular, the behavior of the ductile phase was monitored and related to the toughness obtained. In an attempt to vary the behavior of the ductile phase, the composite materials were exposed to a variety of gaseous environments and subsequently tested in air. The resulting toughness, resistance-curve behavior, and in-situ results highlight the importance of the behavior of the ductile phase on subsequent properties.

• OSTI ID: 7088859
• Journal Information: JOM (Journal of the Minerals, Metals and Materials Society); (United States), Journal Name: JOM (Journal of the Minerals, Metals and Materials Society); (United States) Vol. 44:8; ISSN JOMME
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
360103 -- Metals & Alloys-- Mechanical Properties
360104 -- Metals & Alloys-- Physical Properties
360105 -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
BRITTLE-DUCTILE TRANSITIONS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COMPOSITE MATERIALS
CORROSION
CORROSION RESISTANCE
CRYSTAL STRUCTURE
ELECTRON MICROSCOPY
HAFNIUM ALLOYS
HAFNIUM BASE ALLOYS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
INTERMETALLIC COMPOUNDS
MATERIALS
MICROSCOPY
MOLYBDENUM ALLOYS
MOLYBDENUM BASE ALLOYS
NICKEL ALLOYS
NICKEL BASE ALLOYS
NIOBIUM ALLOYS
NIOBIUM BASE ALLOYS
PHASE STUDIES
RHENIUM ADDITIONS
RHENIUM ALLOYS
SCANNING ELECTRON MICROSCOPY
SILICON ADDITIONS
SILICON ALLOYS
STRESS CORROSION
STRESSES
TANTALUM ALLOYS
TANTALUM BASE ALLOYS
THERMAL STRESSES
TUNGSTEN ALLOYS
TUNGSTEN BASE ALLOYS
ZIRCONIUM ALLOYS
ZIRCONIUM BASE ALLOYS