Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Characterization of fusion welded ceramics in the SiC-ZrB2-ZrC system

Journal Article · · Journal of the European Ceramic Society

Various SiC-ZrB2-ZrC ceramics were joined by fusion welding to determine the maximum silicon carbide content that could be joined. Commercial powders were hot pressed, machined, and preheated to 1450 °C before joining with a tungsten inert gas welding torch at 160–200 A. Resulting welds were cross-sectioned and analyzed to determine which compositions were weldable and to characterize microstructural evolution in welded samples. As compositions approached the ternary eutectic, the welds had smaller SiC grains and exhibited better weldability. Penetration depth of welds was controlled by a combination of current input and welding speed. Here, the ternary eutectic in the system was found at 36.9 ± 1.3 vol% SiC, 42.7 ± 1.5 vol% ZrB2, and 20.4 ± 1.9 vol% ZrC and its melting temperature was 2330 ± 23 °C. A ternary phase diagram for the SiC-ZrB2-ZrC was constructed and proposed via microstructural analysis of arc melted pellets on binary joins between each binary eutectic and the ternary eutectic in the system.

Research Organization:
UES, Inc., Dayton, OH (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0017082
OSTI ID:
1772547
Alternate ID(s):
OSTI ID: 1778450
Journal Information:
Journal of the European Ceramic Society, Journal Name: Journal of the European Ceramic Society Journal Issue: 4 Vol. 41; ISSN 0955-2219
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (25)

Reactions in the system ZrC-ZrB2 journal May 1975
High toughness, 3D textile, SiC/SiC composites by chemical vapor infiltration journal November 2001
The effect of lanthanum on the fabrication of ZrB2–ZrC composites by spark plasma sintering journal January 2003
Materials challenges in nuclear energy journal February 2013
Role of impurities on the spark plasma sintering of ZrCx–ZrB2 composites journal January 2008
Mechanical and physical behavior of spark plasma sintered ZrC–ZrB2–SiC composites journal January 2008
Plasma arc welding of ZrB2–20vol% ZrC ceramics journal December 2014
Mechanical, electrical and thermal properties of ZrC-ZrB2-SiC ternary eutectic composites prepared by arc melting journal September 2018
Silicon carbide composites as fusion power reactor structural materials journal October 2011
Bond failure of a SiC/SiC brazed assembly journal July 2012
Microstructure and mechanical properties of joints in sintered SiC fiber-bonded ceramics brazed with Ag–Cu–Ti alloy journal November 2012
Effect of fiber directionality on the static and dynamic mechanical properties of 3D SiCf/SiC composites journal March 2016
On the stoichiometry of zirconium carbide journal April 2020
Directional Solidification of (Ti, Zr) Carbide-(Ti, Zr) Diboride Eutectics journal March 1984
Indentation Fracture Toughness of Sintered Silicon Carbide in the Palmqvist Crack Regime journal June 1989
Fracture Toughness of 2-D Woven SiC/SiC CVI-Composites with Multilayered Interphases journal April 1996
Pressureless Densification of Zirconium Diboride with Boron Carbide Additions journal May 2006
Pressureless Sintering of Zirconium Diboride Using Boron Carbide and Carbon Additions journal November 2007
Reactive Hot Pressing of ZrB 2 -SiC-ZrC Composites at 1600°C journal August 2008
Laser Melting of Zirconium Carbide: Determination of Phase Transitions in Refractory Ceramic Systems: Laser Melting of Zirconium Carbide journal April 2011
Solidification of welded SiC–ZrB 2 –ZrC ceramics journal April 2018
The Formation and Dissociation of Silicon Carbide journal January 1935
Properties of Silicon Carbide for Nuclear Fuel Particle Coatings journal September 1977
Preparation of ZrB2-SiC composites by arc melting and their properties journal January 2008
Mechanical and oxidation behavior of spark plasma sintered ZrB2–ZrC–SiC composites journal January 2012

Similar Records

Solidification of welded SiC–ZrB 2 –ZrC ceramics
Journal Article · Sat Apr 14 00:00:00 EDT 2018 · Journal of the American Ceramic Society · OSTI ID:1433268

Mechanical properties of fusion welded ceramics in the $\mathrm{SiC-ZrB}$2 and $\mathrm{SiC-ZrB}$2-$\mathrm{ZrC}$ systems
Journal Article · Wed Jan 12 23:00:00 EST 2022 · Journal of the European Ceramic Society · OSTI ID:1977297

Mechanical properties of ZrC-ZrB/sub 2/ and ZrC-TiB/sub 2/ directionally solidified eutectics
Journal Article · Mon Mar 31 23:00:00 EST 1986 · J. Am. Ceram. Soc.; (United States) · OSTI ID:5541458