To main content

High temperature interaction between Si–B alloys and Si3N4

Abstract

Si3N4 is a candidate crucible material for Si–B alloys in high temperature thermal energy storage system. In this regard, the phase formation in the Si–B alloys and the interaction between the alloys and Si3N4 were investigated in an induction furnace at 1750 °C with the B addition of 2, 5, 8, and 11 mass %, respectively. Moreover, the wettability property of the Si-3.25B alloy (mass %) on Si3N4 substrate was examined at temperatures up to 1400 °C. The cross-sectional images and micro-analyses showed that BN precipitates were produced in the Si–B alloys and a BN layer was formed at the interface between the Si–B alloys and Si3N4. However, the amount of BN precipitates was negligible. Next, the equilibrium contact angle of liquid Si-3.25B alloy on Si3N4 substrate was determined to be 134 ± 1°, which indicates non-wetting behavior. The above results support that Si3N4 is a desirable refractory material for the high temperature thermal energy storage system.
Read the publication

Category

Academic article

Language

English

Author(s)

  • Jianmeng Jiao
  • Kai Tang
  • Jafar Safarian
  • Bettina Grorud
  • Kathrine Sellevoll
  • Merete Tangstad

Affiliation

  • SINTEF Industry / Metal Production and Processing
  • Norwegian University of Science and Technology

Year

2021

Published in

Ceramics International

ISSN

0272-8842

Volume

47

Issue

10

Page(s)

13837 - 13844

View this publication at Norwegian Research Information Repository