Accession Number : AD0273314

Title :   SOME EFFECTS OF VARIATION OF HOT-PRESSING TEMPERATURE UPON THE AGGLOMERATION OF MGO IN A DISPERSION STRENGTHENED NICKEL-MGO ALLOY

Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON D C

Personal Author(s) : SCHAFER,ROBERT J. ; QUATINETZ,MAX ; WEETON,JOHN W.

Report Date : MAR 1962

Pagination or Media Count : 1

Abstract : Agglomeration of oxides in a Ni-MgO composite increased with hot-pressing temperatures ranging from 1800 to 2400 F and was influenced by the presence of impurity oxides. The most encouraging result of the investigation was that the hot-pressing method seemed adaptable to producing a dispersoid in a metal matrix approaching dimensions in those of Al - Al2O3 SAP-type alloys. The finest dispersions were obtained in extruded products by using the lowest hot-pressing temperature prior to extrusion and the finest metallic powders. (Author)

Descriptors :   *DISPERSION HARDENING, *MAGNESIUM COMPOUNDS, *NICKEL ALLOYS, ALLOYS, BALL MILLS, COMPOSITE MATERIALS, DENSITY, EXTRUSION, IMPURITIES, METAL FORMING PRESSES, METALS, MIXTURES, OXIDES, POWDER METALLURGY, POWDER METALS, PROCESSING, SINTERING

Distribution Statement : APPROVED FOR PUBLIC RELEASE