PROGRESS LETTER NO. 11 FOR JANUARY 1, 1960 THROUGH JANUARY 31, 1960

Technical Report · Mon Feb 15 04:00:00 EST 1960

OSTI ID:4194062

Baron, E H

A stainless steel autoclave for superheated water corrosion tests was installed and conditioned. Tests were begun to investigate the feasibility of densing slip cast stainless by means of liquid phase sintering. The liquid phase is induced by additions of Nicrobraze stainless steel brazing powder. Nicrobraze powder was sprinkled on the surface of a green specimen and sintered at 1250 deg C for a half hour. Metallographic examination revealed that the resulting plate was completely dense. Tests on stainless steel bars at 1175 deg C revealed no effect of the Nicrobraze powder, but at 1225 deg C, a slight increase in density was effected by each incremental Nicrobrase powder addition. Preparation of tabular fuel elements by vacuum forming was resumed. Uniform, smooth surfaced castings were obtained from a slip thickened with acrysol GS and formed on 0.1 mu thimbles. Castings vacuum formed from slips thickened with acrysol GS were sintered on aluminum mandrels for a half hour at 1175 deg C, and for one hour at 1175 deg C preceded by a half hour pre-heat at the low temperature end of the hot zone. In both tests cracks developed parallel to the axis of the mandrel. (See also AECU-4410.) (C.J.G.)

• Research Organization: Stevens Inst. of Tech., Hoboken, N.J.
• NSA Number: NSA-14-008696
• OSTI ID: 4194062
• Report Number(s): AECU-4695
• Country of Publication: United States
• Language: English

Related Subjects

ALUMINUM OXIDES-- CASTING-- CRACKS-- FABRICATION-- FUEL ELEMENTS-- HEAT TREATMENTS-- SINTERING-- THICKNESS-- TUBES-- VACUUM
BRAZING-- CASTING-- CHROMIUM ALLOYS-- DENSITY-- METALLOGRAPHY-- NICKEL ALLOYS-- PLATES-- POWDERS-- RODS-- SINTERING-- SPUTTERING-- STAINLESS STEELS
CORROSION-- MATERIALS TESTING-- PRESSURE VESSELS-- STAINLESS STEELS-- SUPERHEATING-- WATER
METALS, CERAMICS, AND MATERIALS