Ultrafast high‐temperature sintering of ZrB₂

Abstract

Ultra‐fast high temperature sintering (UHS) is a joule heating method with an extremely high heating rate (∼103–104°C/min). In this work, commercial ZrB2 powders were rapidly densified by UHS to >90% relative density within 60 seconds in vacuum without pressure. Bulk density improved from 75 to 93% of relative density by increasing the sintering duration from 10 to 60 seconds. The final grain size increases from 2.7 ± 1.1 μm to 19.0 ± 8.4 μm when the sintering time increased from 10 to 60 seconds. X‐ray diffraction and energy dispersive spectroscopy show crystalline phase and compositional uniformity in ZrB2 after UHS sintering.This article is protected by copyright. All rights reserved