31.12/2018
Merry Christmas and Happy New Year!
29.11/2018
POLEMA showed powders for additive manufacturing at the international exhibition Formnext 2018
05.09/2018
POLEMA, JSC: advanced developments for extreme temperatures and aggressive environments
The implementation of large-scale investment projects and a powerful research laboratory allow POLEMA, JSC to be at the forefront of new materials creating. POLEMA is ready to supply products for the most difficult conditions and participate in solving the tasks of introducing additive technologies at Russian enterprises.
03.06/2011
Progressive materials for multi-functional vacuum coatings
Application fields of materials for multi-functional vacuum coatings, characteristics of sputtering targets and evaporable sources used for technologies of physical deposition of hardening, protective, decorative and light-reflecting coatings, resistive, switching and transparent electro conductive films.
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.
