Hot impact densification: a new method for producing high density ceramic pellets with close shape tolerances

Journal Article · Thu Jul 01 00:00:00 EDT 1982 · Nucl. Technol.; (United States)

OSTI ID:6058434

Hrovat, M; Huschka, H; Muhling, G; Rachor, L; Zimmerman, H

Density and correct diameter of nuclear fuel pellets are usually achieved by sintering and subsequent circular grinding. Hot impact densification (HID) thermally squatted ceramic bodies can be directly high speed precision-molded in a cold die. For thermoshock-sensitive materials, a controlled cooling down procedure of some minutes is added. The feasibility of HID has been demonstrated on the laboratory scale on UO/sub 2/, UC, and some more materials at temperatures between 1700 and 2300/sup 0/C, pressures up to 800 N/mm/sup 2/. Shape tolerances are close, density can be exactly reproduced within a wide range. Tool wear seems to be no problem. Currently, a prototype facility for continuous performance is being developed.

• Research Organization: Nukem GmbH, Postfach 110080, D-6450 Hanau 11, Germany, F.R.
• OSTI ID: 6058434
• Journal Information: Nucl. Technol.; (United States), Vol. 58:1
• Country of Publication: United States
• Language: English

Related Subjects

11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
36 MATERIALS SCIENCE
FUEL DENSIFICATION
FUEL PELLETS
FABRICATION
URANIUM CARBIDES
URANIUM DIOXIDE
CERAMICS
DENSITY
DIMENSIONS
HOT PRESSING
PRESSURE GRADIENTS
SHAPE
TEMPERATURE GRADIENTS
WEAR RESISTANCE
ACTINIDE COMPOUNDS
CARBIDES
CARBON COMPOUNDS
CHALCOGENIDES
MATERIALS WORKING
MECHANICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PELLETS
PHYSICAL PROPERTIES
PRESSING
URANIUM COMPOUNDS
URANIUM OXIDES
050700* - Nuclear Fuels- Fuels Production & Properties
360201 - Ceramics
Cermets
& Refractories- Preparation & Fabrication