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Cobalt Aluminate Inoculants for Investment Casting
Ferro offers cobalt-aluminate inoculant nucleation agents proven to be effective in the investment casting process of super alloys.
Ferro‘s cobalt aluminate inoculants meet the high performance and tight tolerance demands required during the investment casting (lost wax) process in producing turbine blades and nozzle guide vanes for aerospace original equipment manufacturers (OEM).
These inoculants have a consistent and optimized distribution of fine-sized grain microstructures that result in improved fatigue strength, making them ideal for delivering specific grain sizes for many industrial applications.
Our standard cobalt aluminate inonculants contain a cobalt content as low as 33% and they are more cost effective in comparison to the 40% phase purity cobalt found in a typical cobalt oxide or cobalt silicate. Ferro inoculants also offer good slurry disperseability due to the additional low impurity content of silver (Ag), bismuth, (Bi) and lead (Pb).
We also offer completed customized inoculant formulations with varying cobalt content as required based on specific applications.
FERRO COBALT (II) ALUMINATE ADVANTAGES
- Consistent, optimally fine-grained, small particle size distribution
- Higher homegeniety and smaller grain size than Cobalt (II, III) Oxide
- Good slurry dispersibility
- Very low impurity content (Ag, Bi, Pb)
- Excellent cost-effectiveness due to lower content (33% cobalt content vs. 40% or more in cobalt oxide or cobalt silicate)
- Phase purity
FERRO 224 807 COBALT ALUMUNATE INCOCULANT PROPERTIES
| Metal Content | Specification | Method |
| Co | 33 ± 1 % | X-ray fluorescence analysis |
| Pb | < 60 ppm | Leaching 1 g of sample with 10 ml HNO3 + 10 ml H2O + 5 ml HF for 1 h at 60 °C, analysis by AAS or ICP |
| Bi | < 2 ppm | |
| Ag | < 5 ppm |
| Particle Size Distribution | Specification | Method |
| d10 | - | Device: Cilas 1064; Dispersion: 0.5 g powder + 0.5 ml dispersion agent/water (1:1) |
| d50 | 1.5 ± 0.5 µm | |
| d90 | < 6 µm |
MINERALOGICAL CHARACTERIZATION (X-RAY DIFFRACTION)
| Phase | Empirical Formula | Content (wt-%) |
| Spinel | CoAl2O4 | > 99 |
| Corundum | Al2O3 | < 1 |
| Spinel | Co3O4 | < 1 |
VALUE ADDED SERVICES
Applications Technology Support-Custom Formulations
We work closely with our customers to co-innovate and develop customized high-performing and economical solutions based on application requirements and operational processing needs, including tailored formulations and formulation guides.
