Co2B — Properties & Data | MatWorld

Co2B

Name: Co2B
Brand: MatWorld

metal

· Co2B

Co₂B is a cobalt boride intermetallic compound that forms as a hard, brittle phase in cobalt-based alloy systems. It is primarily encountered as a constituent in tool steels, wear-resistant coatings, and high-performance alloys rather than as a standalone material, where it contributes exceptional hardness and thermal stability. Engineers select cobalt borides for applications demanding resistance to abrasive wear, high-temperature oxidation, and mechanical impact; common alternatives include tungsten carbides and ceramic composites, though cobalt borides offer superior toughness in certain duty cycles.

wear-resistant tool coatingscutting tool insertsthermal barrier systemshigh-temperature alloysabrasive wear protectionresearch/specialty metallurgy

Compliance & Regulations

?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65

Units:

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Method

Property	Value	Unit	Conditions
Bulk Modulus(K)2 entries	246.7	GPa	DFT
↳	264.2	GPa	DFT · OptB88vdW
Poisson's Ratio(ν)	0.3300	-	DFT · OptB88vdW
Shear Modulus(G)2 entries	104.0	GPa	DFT
↳	99.92	GPa	DFT · OptB88vdW

N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form, heat treatment, basis, or test environment.

Verified Unverified Low confidence (<80%) Link to source

Property	Value	Unit	Conditions	Source
Density(ρ)	8.187	kg/m³	DFT · OptB88vdW

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Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	0.000	eV	DFT · OptB88vdW
↳	0.000	eV	DFT · TBmBJ
Magnetic Moment(μB)	3.725	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000220	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000229	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-4.310	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	-4.433	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C

N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form, heat treatment, basis, or test environment.

Verified Unverified Low confidence (<80%) Link to source

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Method

Property	Value	Unit	Conditions
Energy Above Hull(ΔEhull)	0.03510	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)2 entries	-0.2094	eV/atom	DFT · OptB88vdW
↳	-0.2011	eV/atom	Measured

N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form, heat treatment, basis, or test environment.

Verified Unverified Low confidence (<80%) Link to source

Reference data from cited sources. Not verified or certified by MatWorld Inc. Verify against the source before use in design. Terms: engineering data

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Environmental

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RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.

Co2B

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