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POLEMA’s QMS confirmed its compliance with ISO 9001:20015
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Molybdenum and tungsten products for production of leucosapphires
POLEMA JSC is the leading global manufacturer of chromium, molybdenum, tungsten products, metal powders and composite materials.
Nickel-manganese powder for diamond synthesis
Use
Fast-quenched powder of the nickel-manganese alloy AP-MnNi40 in flake form is widely used in producing synthesized diamonds of various sizes.
The powder is used as a catalyst in a reaction mixture with pure graphite.
Chemical composition
Grade | Nominal composition, % | ||
Mn | Ni | C | |
AP-MnNi40 grade A1 | base | 40 | ≤ 0.3 |
AP-MnNi40 grade A2 | base | 40 | ≤ 0.3 |
AP-MnNi40 grade B1 | base | 40 | 0.8-1.5 |
AP-MnNi40 grade B2 | base | 40 | 0.8-1.5 |
AP-MnNi40 grade C1 | base | 40 | 1.5-2.5 |
AP-MnNi40 grade C2 | base | 40 | 1.5-2.5 |
Powder classes by particle size
Powder class | Base fraction, microns | Packed density, g/cm3 |
1 | ≤ 100 | 3.7-4.5 |
2 | 50-315 | 2.0-3.0 |
3 | 100-400 | 1.8-2.5 |
3A | 100-400 | 2.5-3.0 |
4 | 315-800 | 1.4-2.0 |
5 | 400-1250 | 1.0-1.3 |
6 | 400-1250 | 1.4-1.6 |
7 | 400-1250 | 1.65-2.0 |
Key technological advantages of the catalyst:
- high homogeneity of the reaction mixture with dispersive graphite;
- the ability to vary the packed density of the reaction mixture;
- the structure's high homogeneity and grain fineness;
- minimal content of impurities in the alloy;
- good plasticity and shapability ensure a wide field of contact between the catalyst and the graphite;
- the catalyst boosts the level of graphite transmutation and the hardness and sizes of the diamonds.