Accession Number : AD0257122

Title :   PLASTIC DEFORMATION IN SINTERING OF SILVER POWDER BODIES

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : ANDRIYEVS'KIY,R.O. ; FEDORCHENKO,I.M.

Report Date : 21 OCT 1960

Pagination or Media Count : 1

Abstract : Results are presented of an investigation of the effect of uniaxial tensile and compressive stresses on the kinetics of shrinkage during sintering of powder metal compacts. The experiments were conducted on compacts of electrolyticAg powder of a 44-micron fraction with a porosity of 30%. The sintering temperature was 900 + or - 10C. Tensile stresses were varied from 0 to 1.1 x 10 to the 6th power dynes/sq cm during heating periods of 6 min. At a tensile stress of 1 x 10 to the 6th power dynes/sq cm linear shrinkage ceased and elongation began. Volume shrinkage increased despite decreasing linear shrinkage until elongation began, then volume shrinkage decreased. Similar results were obtained when compression was applied. An analysis of the data indicated that plastic deformation does not effect the kinetics of shrinkage for short exposure.

Descriptors :   *POWDER METALS, CREEP, DEFORMATION, MECHANICAL PROPERTIES, PHYSICAL PROPERTIES, PLASTIC PROPERTIES, POWDER METALLURGY, SILVER, SINTERING, STRESSES, VISCOSITY

Distribution Statement : APPROVED FOR PUBLIC RELEASE