TiB2 PS
Heat-treated state
PS = pressureless sintered TiB₂ with sintering aids
Choose pressureless sintering with aids at 95–97 % density for large or complex parts such as aluminium reduction cell cathode blocks, accepting slightly lower strength and hardness.
Values for the PS condition
Other TiB2 tempers and conditions
TiB2 is listed in 6 conditions; see the grade overview at TiB2.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
TiB₂–AlN | Use the AlN(–BN) evaporation-boat formulation for vacuum aluminium metallising: resistive heating, resistance to molten-aluminium wetting and better thermal shock resistance than the plain boride. | — | 65 | 0.07 | 900 HV | 60 W/m·K |
TiB₂–SiC | Choose the 10–30 vol % SiC particulate addition to refine grain size and raise strength and oxidation resistance for armour and high-temperature wear parts. | — | 350 | 0.12 | 2,800 HV | 80 W/m·K |
TiB₂–BN | Use the hexagonal BN addition when the part must be turned and milled directly with carbide tooling — continuous-casting break rings and molten-metal sizing components. | — | — | — | 600 HV | 45 W/m·K |
PSThis page Pressureless sintered TiB₂ with sintering aids | Choose pressureless sintering with aids at 95–97 % density for large or complex parts such as aluminium reduction cell cathode blocks, accepting slightly lower strength and hardness. | — | — | — | 2,500 HV | 70 W/m·K |
HPDefault Hot-pressed TiB₂, ≥98 % purity, ~99 % dense | Default fully dense grade at ≥98 % purity and about 99 % density for wear parts, wire-drawing dies, molten-aluminium contact components and electrodes. | — | — | — | 3,000 HV | 90 W/m·K |
Hot isostatic pressed | Pick hot isostatic pressing at ≥99 % purity and >99.5 % density for the highest strength and lowest porosity — armour panels and complex, highly stressed wear parts. | — | — | — | 3,300 HV | 100 W/m·K |
What is TiB2 PS?
TiB2 PS is TiB2 heat treated to PS — choose pressureless sintering with aids at 95–97 % density for large or complex parts such as aluminium reduction cell cathode blocks, accepting slightly lower strength and hardness. The elastic modulus is 480 GPa (69.6 Msi). TiB2 PS has a density of 4.3 g/cm³ (0.155 lb/in³), lighter than 56% of ceramic grades. It melts at 3,225°C (5,837 °F). HP is the default condition FabDigit quotes; PS is available on request or by drawing note.
Advantages
- Stiff — 480 GPa (69.6 Msi), better than 76% of ceramic grades
Limitations
- High embodied carbon — 25 kg CO₂/kg, worse than 78% of ceramic grades
TiB2 PS properties
Typical room-temperature values for TiB2 PS; 13 are specific to this condition. Other listed values are TiB2 reference data and may not represent this condition. Bars are the position among ceramic grades.
Physical3
TiB2 PS has a density of 4.3 g/cm³ (0.155 lb/in³), lighter than 56% of ceramic grades. It melts at 3,225°C (5,837 °F).
Mechanical10
The elastic modulus is 480 GPa (69.6 Msi).
Thermal5
TiB2 PS is rated for continuous service to 850°C (1,562 °F). It conducts heat at 70 W/m·K (40.4 BTU/hr·ft·°F), better than 70% of ceramic grades. Thermal expansion is 6.6 µm/m·K (3.67 µin/in·°F).
Electrical2
TiB2 PS has an electrical resistivity of 3×10⁻⁷ Ω·m.
Chemical & Environmental2
Corrosion resistance is good (62/100), worse than 70% of ceramic grades.
Sustainability3
Producing a kilogram of TiB2 PS takes about 350 MJ of energy and emits 25 kg of CO₂ — more than 81% of ceramic grades. Typical recycled content is 0%.
Manufacturability3
TiB2 PS's machinability is not recommended (8/100, better than 69% of ceramic grades).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with TiB2 PS
Is TiB2 easy to machine?
After sintering only diamond grinding and lapping apply, but the low electrical resistivity allows wire and sinker EDM — the main machining advantage of TiB₂ over other ultra-hard ceramics.
Can TiB2 be welded?
Not fusion weldable; join to metals by active brazing with Ti- or Zr-bearing fillers, or by mechanical clamping. Match thermal expansion to avoid cracking.
Can TiB2 be formed, bent or molded?
Near-net shape comes from cold isostatic pressing of powder plus pressureless sintering, or hot pressing in graphite dies at 1800–2000 °C and 20–30 MPa; HIP is used for fully dense complex parts.
What surface finishes work on TiB2?
Diamond lapping and polishing reach Ra < 0.1 µm. No plating or painting; SiC or oxide coatings can be added to suppress oxidation above 900 °C.
TiB2 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Bstoichiometric TiB₂ | 30 – 31.5 | 31.1 |
| Cresidual from carbothermal synthesis | ≤ 0.5 | 0.2 |
| Osurface oxide on powder | ≤ 1 | 0.4 |
| Femilling pickup | ≤ 0.2 | 0.05 |
| N | ≤ 0.3 | 0.1 |
| Ti≈68.9 wt % nominal | balance | — |
TiB2 PS — frequently asked
What is TiB2 PS used for?
TiB2 PS is typically used for evaporation boats for metallizing, cutting tool inserts, armor tiles and wear-resistant coatings. In short: EDM-machinable ultra-hard ceramic; conductive boride wear material; high modulus at 4.5 g/cm³.
Is TiB2 PS easy to machine?
Not especially — machinability is rated not recommended (8/100, better than 69% of ceramic grades). After sintering only diamond grinding and lapping apply, but the low electrical resistivity allows wire and sinker EDM — the main machining advantage of TiB₂ over other ultra-hard ceramics.
Can TiB2 PS be welded?
Not fusion weldable; join to metals by active brazing with Ti- or Zr-bearing fillers, or by mechanical clamping. Match thermal expansion to avoid cracking.
What surface finishes work on TiB2 PS?
Diamond lapping and polishing reach Ra < 0.1 µm. No plating or painting; SiC or oxide coatings can be added to suppress oxidation above 900 °C.
Can TiB2 PS be formed, bent or molded?
Near-net shape comes from cold isostatic pressing of powder plus pressureless sintering, or hot pressing in graphite dies at 1800–2000 °C and 20–30 MPa; HIP is used for fully dense complex parts.
What is the maximum service temperature of TiB2 PS?
TiB2 PS is rated for continuous use to about 850°C (1,562 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- Engineered Materials Handbook Vol. 4: Ceramics and Glasses — ASM International (1991)
- Handbook of Refractory Carbides and Nitrides / Boride property tables — Noyes/Elsevier (1996)
- Titanium Diboride (TiB₂) technical ceramic datasheet — CoorsTek (2023)
- Boride ceramics and evaporation boat materials — Kennametal / Momentive-type boat producers (2022)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.