process for improving the properties of the sintered aluminum, especially for nuclear applications

摘要

Occluded hydrogen is removed from aluminium powder having up to 20% by weight alumina by subjecting it prior to sintering to a hot degassing treatment at 550-600 DEG C. for 10-30 hours in an oven under a vacuum of 10-4 to 10-5 mm. Hg. Prior to the degassing treatment, the powder may be cold compacted or formed into semi-finished products such as lamina or extruded shapes. The powder may have a grain-size of 50-200 microns and after treatment may contain only 2-5 p.p.m. of hydrogen.