MACHINING HIGH PURITY ALUMINA.
Abstract
Material A-96 selected for the machining demonstration can be drilled, ground, threaded, slotted, tapped and turned. The material can be readily removed by either a grinding wheel or a single point cutting tool. Care must be exercised when using a single point cutting tool with regard to feeds, speeds, tool geometry, and cutting angles. The chemistry behind the acid treating and the reconstitution are not fully understood. The material A-96 treated alumina appears to be able to be reconstituted to a dense body of higher purity than the original body. Hydrofluoric acid seems to attack most bodies more readily than hydrochloric acid and 52% aqueous HF seems to attack more readily than 70% aqueous HF. There appears to be some optimum per cent aqueous acid between 70% and 40%. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 31, 1964
- Accession Number
- AD0614467
Entities
People
- J. M. Infield
- P. A. Marshall Jr.