The Role of Chemical Reactions in the Mechanism of Comminution of Ductile Metals into Ultrafine Powders by Grinding
Abstract
On grinding in pure water, zirconium, tantalum iron and stainless-steel powders were extensively comminuted and simultaneously oxidized with hydrogen release, whereas nickel, copper, and silver powders did not react with water and their particle sizes increased. On grinding nickel, copper, and silver in water pressurized with oxygen nickel and copper became extensively comminuted and were oxidized, whereas silver did not react with oxygen and its particle size increased. From these results and other considerations, it is hypothesized that for extensive comminution of ductile metals and alloys to occur on grinding they must react with the grinding media.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1968
- Accession Number
- ADA381962
Entities
People
- Alan Arias
Organizations
- National Aeronautics and Space Administration