Article Improving the Dimensional Stability and Mechanical Properties of AISI 316L + B Sinters by Si3N4 Addition

Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

Abstract

The following paper describes a new and eective method to obtain high-density sinters
with simultaneously decreased distortions, produced by one press and sinter operation. This eect
was achieved through the induced disappearance of the eutectic liquid phase. The study was carried
out on AISI 316L stainless steel powder that was mixed with elemental boron and silicon nitride.
Boron was used as a sintering process activator. The scientific novelty of this publication consists of
the use of a silicon nitride as a solid-state nitrogen carrier that was intended to change the borides’
morphology by binding boron. Based on the thermodynamic calculations, 20 blends of various
compositions were tested for physical properties, porosity, microstructure, and mechanical properties.
Moreover, phase compositions for selected samples were analyzed. It was shown that the addition
of silicon nitride as a nitrogen carrier decreases the boron-based eutectic phase volume and both
increases the mechanical properties and decreases after-sintering distortions. An explanation of the
observed phenomena was also proposed.
Originalspracheenglisch
Aufsatznummer1798
Seitenumfang15
FachzeitschriftMaterials
Jahrgang12
Ausgabenummer11
DOIs
PublikationsstatusVeröffentlicht - 3 Jun 2019

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