Micro-hardness of nanocrystalline palladium and copper produced by inert-gas condensation

Journal Article · Thu Nov 30 23:00:00 EST 1989 · Scripta Metallurgica; (USA)

DOI:https://doi.org/10.1016/0036-9748(89)90223-8· OSTI ID:6902084

Nieman, G W; Weertman, J R ^[1]; Siegel, R W ^[2]

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1. Northwestern Univ., Evanston, IL (USA). Dept. of Materials Science and Engineering
2. Argonne National Lab., IL (USA)

This report describes the major results of a Vickers microhardness study of nanocrystalline palladium and copper produced by the inert-gas condensation method. Small grain size is known to have a strong influence on mechanical properties at low and intermediate temperatures, as observed in the Hall--Petch effect, Coble creep, and superplasticity. Until recently, the mechanical properties of nanocrystalline materials with mean grain diameters of 5 to 50 nm have not been explored. A microhardness study on conventional compacted tungsten powder indicated that the Hall--Petch effect extends to the 150 nm range; and effects of nanocrystalline grain size on mechanical properties of TiO{sub 2} have been investigated.

• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6902084
• Journal Information: Scripta Metallurgica; (USA), Journal Name: Scripta Metallurgica; (USA) Vol. 23:12; ISSN 0036-9748; ISSN SCRMB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360103* -- Metals & Alloys-- Mechanical Properties
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360203 -- Ceramics
Cermets
& Refractories-- Mechanical Properties
CHALCOGENIDES
COPPER
CRYSTAL STRUCTURE
ELEMENTS
GRAIN SIZE
HALL EFFECT
HARDNESS
MECHANICAL PROPERTIES
MEDIUM TEMPERATURE
METALS
MICROHARDNESS
MICROSTRUCTURE
OXIDES
OXYGEN COMPOUNDS
PALLADIUM
PLATINUM METALS
SIZE
TEMPERATURE EFFECTS
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
TUNGSTEN