Plasma Arc Welding of ZrB₂-20 vol% ZrC Ceramics

Bruce King; Greg Hilmas; William Fahrenholtz

doi:10.1016/j.jeurceramsoc.2014.05.011

Plasma Arc Welding of ZrB₂-20 vol% ZrC Ceramics

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Zirconium diboride ceramics containing 20vol% zirconium carbide were preheated to 1450⁰C and plasma arc welded to produce continuous joints. Arc welding was completed using a current of 198A, plasma flow rate of 0.75l/min, and welding speed of~8cm/min. Two fusion zones, having penetration depths of 4.4 and 2.3mm, resulted in different microstructures. One fusion zone contained ZrB ₂ crystals, up to~1mm in length, and a ZrB ₂ -ZrC eutectic. The second fusion zone revealed ZrB ₂ and ZrC, along with C that was attributed to diffusion from the graphite support used during welding. ZrB ₂ and ZrC grains in the latter fusion zone were asymmetric, having an average maximum Feret diameter of 52.4±53.2μm and 10.8±8.1μm, respectively. Hardness, used to identify a heat affected zone for both weldments, increased from 12GPa at the fusion zone boundary, to the hardness of the parent material, 15.2±0.1GPa.

Original language	American English
Pages (from-to)	3549-3557
Number of pages	9
Journal	Journal of the European Ceramic Society
Volume	34
Issue number	15
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2014.05.011
State	Published - Dec 1 2014

Keywords

Advanced ceramics
Microstructural analysis
Welding
ZrC
Carbides
Ceramic materials
Electric welding
Hardness
Feret diameter
Parent materials
Zirconium carbide
Zirconium diboride

Disciplines

Materials Science and Engineering

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https://doi.org/10.1016/j.jeurceramsoc.2014.05.011

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@article{f476986cfe744a8da37955e3beb338e2,

title = "Plasma Arc Welding of ZrB₂-20 vol\% ZrC Ceramics",

abstract = " Zirconium diboride ceramics containing 20vol\% zirconium carbide were preheated to 1450⁰C and plasma arc welded to produce continuous joints. Arc welding was completed using a current of 198A, plasma flow rate of 0.75l/min, and welding speed of\textasciitilde{}8cm/min. Two fusion zones, having penetration depths of 4.4 and 2.3mm, resulted in different microstructures. One fusion zone contained ZrB 2 crystals, up to\textasciitilde{}1mm in length, and a ZrB 2 -ZrC eutectic. The second fusion zone revealed ZrB 2 and ZrC, along with C that was attributed to diffusion from the graphite support used during welding. ZrB 2 and ZrC grains in the latter fusion zone were asymmetric, having an average maximum Feret diameter of 52.4±53.2μm and 10.8±8.1μm, respectively. Hardness, used to identify a heat affected zone for both weldments, increased from 12GPa at the fusion zone boundary, to the hardness of the parent material, 15.2±0.1GPa.",

keywords = "Advanced ceramics, Microstructural analysis, Welding, ZrC, Carbides, Ceramic materials, Electric welding, Hardness, Feret diameter, Parent materials, Zirconium carbide, Zirconium diboride",

author = "Bruce King and Greg Hilmas and William Fahrenholtz",

year = "2014",

month = dec,

day = "1",

doi = "10.1016/j.jeurceramsoc.2014.05.011",

language = "American English",

volume = "34",

pages = "3549--3557",

journal = "Journal of the European Ceramic Society",

issn = "1873-619X",

number = "15",

}

TY - JOUR

T1 - Plasma Arc Welding of ZrB₂-20 vol% ZrC Ceramics

AU - King, Bruce

AU - Hilmas, Greg

AU - Fahrenholtz, William

PY - 2014/12/1

Y1 - 2014/12/1

N2 - Zirconium diboride ceramics containing 20vol% zirconium carbide were preheated to 1450⁰C and plasma arc welded to produce continuous joints. Arc welding was completed using a current of 198A, plasma flow rate of 0.75l/min, and welding speed of~8cm/min. Two fusion zones, having penetration depths of 4.4 and 2.3mm, resulted in different microstructures. One fusion zone contained ZrB 2 crystals, up to~1mm in length, and a ZrB 2 -ZrC eutectic. The second fusion zone revealed ZrB 2 and ZrC, along with C that was attributed to diffusion from the graphite support used during welding. ZrB 2 and ZrC grains in the latter fusion zone were asymmetric, having an average maximum Feret diameter of 52.4±53.2μm and 10.8±8.1μm, respectively. Hardness, used to identify a heat affected zone for both weldments, increased from 12GPa at the fusion zone boundary, to the hardness of the parent material, 15.2±0.1GPa.

AB - Zirconium diboride ceramics containing 20vol% zirconium carbide were preheated to 1450⁰C and plasma arc welded to produce continuous joints. Arc welding was completed using a current of 198A, plasma flow rate of 0.75l/min, and welding speed of~8cm/min. Two fusion zones, having penetration depths of 4.4 and 2.3mm, resulted in different microstructures. One fusion zone contained ZrB 2 crystals, up to~1mm in length, and a ZrB 2 -ZrC eutectic. The second fusion zone revealed ZrB 2 and ZrC, along with C that was attributed to diffusion from the graphite support used during welding. ZrB 2 and ZrC grains in the latter fusion zone were asymmetric, having an average maximum Feret diameter of 52.4±53.2μm and 10.8±8.1μm, respectively. Hardness, used to identify a heat affected zone for both weldments, increased from 12GPa at the fusion zone boundary, to the hardness of the parent material, 15.2±0.1GPa.

KW - Advanced ceramics

KW - Microstructural analysis

KW - Welding

KW - ZrC

KW - Carbides

KW - Ceramic materials

KW - Electric welding

KW - Hardness

KW - Feret diameter

KW - Parent materials

KW - Zirconium carbide

KW - Zirconium diboride

UR - https://scholarsmine.mst.edu/matsci_eng_facwork/1616

UR - https://doi.org/10.1016/j.jeurceramsoc.2014.05.011

U2 - 10.1016/j.jeurceramsoc.2014.05.011

DO - 10.1016/j.jeurceramsoc.2014.05.011

M3 - Article

SN - 1873-619X

VL - 34

SP - 3549

EP - 3557

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

IS - 15

ER -

Plasma Arc Welding of ZrB₂-20 vol% ZrC Ceramics

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