Processing and properties of ZrC, ZrN and ZrCN ceramics: a review

Harrison, R. W.; Lee, William

doi:10.1179/1743676115y.0000000061

Cited by 182 publications

(75 citation statements)

References 90 publications

(290 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…High-temperature conductivity measurements are nontrivial to make so it is unsurprising that considerable scatter exists across the reported thermal data. 4,10,11 Our computational predictions are therefore expected to be of practical use, as well as providing valuable theoretical insight into the basic competing factors that determine high-temperature conductivity. Advances in the computational treatment of phonons applied to thermal conductivity, [12][13][14] provide us with a timely opportunity to present transport predictions for the prototypical ultra-high-temperature ceramic ZrC.…”

Section: Introductionmentioning

confidence: 99%

Electron and phonon interactions and transport in the ultrahigh-temperature ceramic ZrC

et al. 2019

View full text Add to dashboard Cite

We have simulated the ultra-high-temperature ceramic zirconium carbide (ZrC) in order to predict electron and phonon scattering properties, including lifetimes and transport. Our predictions of heat and charge conductivity, which extend to 3000 K, are relevant to extreme temperature applications of ZrC. Mechanisms are identified on a first principles basis that considerably enhance or suppress heat transport at high temperature, including strain, anharmonic phonon renormalization and fourphonon scattering. The extent to which boundary confinement and isotope scattering effects lower thermal conductivity is predicted.

show abstract

Section: Introductionmentioning

confidence: 99%

Electron and phonon interactions and transport in the ultrahigh-temperature ceramic ZrC

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Such thermal residual stresses can be quantitatively estimated by:

σ_{mr} = \frac{(α_{p} - α_{m}) Δ T}{(\frac{1 + v_{m}}{2 E_{m}}) + (\frac{1 - 2 v_{p}}{E_{p}})}

σ_{mt} = - \frac{σ_{mr}}{2}

where σ mr and σ mt denote the radial and tangential matrix stresses around a Zr 2 CN particle, respectively, α p and α m denote the CTE of Zr 2 CN and SiC, respectively, ν is the Poisson’s ratio, Δ T is the temperature difference over which the stress is not relieved by the diffusive process, and the subscripts p and m refer to the particle and matrix, respectively. Using the values of 400 and 410 GPa for E p and E m , 7.65 × 10 −6 and 4.3 × 10 −6 °C −1 for α p and α m , 0.2 and 0.19 for ν p and ν m , respectively, and 1000°C for Δ T , the radial tensile stress developed around Zr 2 CN particles is 1135 MPa, while the tangential compressive stress is −568 MPa. This stress field implies that an approaching crack inside the matrix is attracted by the radial tensile stress existing around the particle, whereas the compressive tangential stress diverts the crack around the particle .…”

Section: Resultsmentioning

confidence: 99%

Mechanical properties of silicon carbide—in situ zirconium carbonitride composites

Malik

Jang

Kim

et al. 2019

Int J Applied Ceramic Tech

View full text Add to dashboard Cite

SiC-Zr 2 CN composites were fabricated by conventional hot pressing from β-SiC and ZrN powders with 2 vol% equimolar Y 2 O 3 -Sc 2 O 3 as a sintering additive. The effects of the ZrN addition on the room-temperature (RT) mechanical properties and hightemperature flexural strength of the SiC-Zr 2 CN composites were investigated. The fracture toughness gradually increased from 4.2 ± 0.3 MPa·m 1/2 for monolithic SiC to 6.3 ± 0.2 MPa·m 1/2 for a SiC-20 vol% ZrN composite, whereas the RT flexural strength (546 ± 32 MPa for the monolithic SiC) reached its maximum of 644 ± 87 MPa for the SiC-10 vol% ZrN composite. The monolithic SiC had improved strength at 1200°C, whereas the SiC-Zr 2 CN composites could not retain their RT strengths at 1200°C. The typical flexural strength values of the SiC-0, 10, and 20 vol% ZrN composites at 1200°C were 650 ± 53, 448 ± 31, and 386 ± 19 MPa, whereas their RT strength values were 546 ± 32, 644 ± 87, and 528 ± 117 MPa, respectively. K E Y W O R D S hot pressing, mechanical properties, SiC-Zr 2 CN composites, silicon carbide, strength

show abstract

“…-6 K -1 [41] and 9.4 9 10 -6 K -1 for TiN [42], whereas the thermal expansion coefficient of maraging steels, a m , is about 10 9 10 -6 K -1 . The relatively higher coefficient of thermal expansion of maraging steels leads to higher contraction during cooling of the material, inducing compressive residual stresses in the inclusion.…”

Section: Discussionmentioning

confidence: 99%

Influence of inclusion type on the very high cycle fatigue properties of 18Ni maraging steel

Karr¹,

Schuller²,

Fitzka³

et al. 2017

J Mater Sci

View full text Add to dashboard Cite

The very high cycle fatigue (VHCF) properties of four 18Ni maraging steels were investigated. Ultrasonic fatigue tests were performed on thin sheets with nitrided surfaces at load ratio R = 0.1. Traditional maraging steel containing Ti (material A) showed crack initiation at TiN-inclusions. The elimination of Ti and the increase in Co content (material B) lead to preferential crack initiation at aluminate-inclusions. Aluminate-inclusions are less damaging than TiN-inclusions, and material B shows higher VHCF strength than material A. A further developed maraging steel (material C) with reduced Co content that is compensated for by alloying with Al showed crack initiation at aluminate-as well as at Zr(N,C)-inclusions. Zr(N,C)-inclusions are more damaging than aluminateinclusions and less damaging than TiN-inclusions. The highest VHCF strength was found for a recently developed alloy with further increased Al content (material D). In addition to inclusion-initiated fracture, this material showed shear mode crack initiation in the nitrided zone at the surface.

show abstract

Processing and properties of ZrC, ZrN and ZrCN ceramics: a review

Cited by 182 publications

References 90 publications

Electron and phonon interactions and transport in the ultrahigh-temperature ceramic ZrC

Electron and phonon interactions and transport in the ultrahigh-temperature ceramic ZrC

Mechanical properties of silicon carbide—in situ zirconium carbonitride composites

Influence of inclusion type on the very high cycle fatigue properties of 18Ni maraging steel

Contact Info

Product

Resources

About