Carbon Bonding Controls the Electron and Phonon Thermal Conductivity in High Entropy Carbides

Rost, Christina M.; Borman, Trent; Hossain, Mohammad Delower; Lim, Mina; Quiambao-Tomko, Kathleen; Tomko, John A.; Brenner, Donald W.; Maria, Jon‐Paul; Hopkins, Patrick E.

doi:10.2139/ssrn.3539255

Cited by 2 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In particular, 4-point bending strengths increased by 40% to 60%, while fracture toughness improved by about 20%. [62,63,66]. Reducing the carbon content of films increased the metallic bonding, raising the electronic contribution to the thermal conductivity [62].…”

Section: Disorder-enhanced Propertiesmentioning

confidence: 99%

See 1 more Smart Citation

High-entropy ceramics: propelling applications through disorder

Toher¹,

Oses²,

Esters³

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

Disorder enhances desired properties, as well as creating new avenues for synthesizing materials. For instance, hardness and yield stress are improved by solid-solution strengthening, a result of distortions and atomic size mismatches. Thermo-chemical stability is increased by the preference of chemically disordered mixtures for high-symmetry super-lattices. Vibrational thermal conductivity is decreased by force-constant disorder without sacrificing mechanical strength and stiffness. Thus, high-entropy ceramics propel a wide range of applications: from wear resistant coatings and thermal and environmental barriers to catalysts, batteries, thermoelectrics and nuclear energy management. Here, we discuss recent progress of the field, with a particular emphasis on disorder-enhanced properties and applications.

show abstract

Section: Disorder-enhanced Propertiesmentioning

confidence: 99%

“…[62,63,66]. Reducing the carbon content of films increased the metallic bonding, raising the electronic contribution to the thermal conductivity [62]. Very low thermal conductivities were reported for multicomponent chalcogenides [27,28] -promising for thermoelectric applications.…”

Section: Disorder-enhanced Propertiesmentioning

confidence: 99%

High-entropy ceramics: propelling applications through disorder

Toher¹,

Oses²,

Esters³

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…22,49 A fundamental feature of HEMs is the presence of a significant lattice distortion that effectively scatters heat-carrying phonons, leading to reduced lattice thermal conductivity. 44,[50][51][52] In parallel, the stabilization of single-phase structures through increased entropy weakens the electron scattering at phase boundaries in multiphase HEMs. This entropy-driven structural stabilization has a favorable effect on enhancing electrical transport properties.…”

Section: Introductionmentioning

confidence: 99%