ULTRASONIC TREATMENT EFFECT ON THE CONSOLIDATION OF Fe-Cr PARTICLE MIXTURES AFTER COMPACTION AND SINTERING PROCESS

Abstract

ULTRASONIC TREATMENT EFFECT ON THE CONSOLIDATION OF Fe-Cr PARTICLE
MIXTURES AFTER COMPACTION AND SINTERING PROCESS. Fe-Cr microalloys which obtained by
ultrasonic method are the initial cores for the consolidation process. Therefore its facilitate the formation of the
homogeneous bulk of Fe-Cr alloy with a stable phase. In this research, the synthesis of bulk of Fe-Cr alloy from
the particles mixture of (Fe+Cr) as the ultrasonic treatment results has been carried out. The particles
consolidation has been carried out through a process of compaction without adding any lubricants and followed
by sintering process in the quartz glass capsules by using induction furnace at 1300 °C. Consolidation of mixture
of Fe-Cr particles that have not undergone previous ultrasonic treatment is also made for a comparison. The
investigation by using the SEM (scanning electron microscope)- and density measurements method were
preformed on the Fe-Cr green powders compaction. The bulk of Fe-Cr alloys that are produced trough sintering
process was observed using SEM-EDS (energy dispersive spectroscopy), XRD (x-ray diffraction), and density
measurements method. The bulk of Fe-Cr alloy prepared with ultrasonically treated Fe-Cr microalloy powders,
is more homogeneous in composition and has a better phase stability in comparison to Fe-Cr powders prepared
without the ultrasonic treatment. Production of bulk Fe-Cr alloy in quartz glass capsule during the sintering
process has produced Fe-Cr alloy without oxides.