Boron nitride in powder metallurgy
In powder metallurgy, boron nitride is used as a protective, release, and coating material to prevent reactions between metal and tool surfaces.
Its high-temperature resistance up to 2200 °C, excellent non-wetting properties, and chemical resistance make it an indispensable material in thermal and forming processes.
Henze BNP’s boron nitride solutions ensure the highest reproducible quality, reduce maintenance requirements, and enhance process reliability.
Typical applications:
- Crucibles, nozzles, and other molded parts made from various HeBoSInt® materials
- Boron nitride coating used as a release agent in the sintering process
- Bornitrid in der additiven Fertigung
- Boron nitride protective coatings for mold inserts and fixtures
Our Boron Nitride Recommendations
HeBoSint ® SL-N 300
HeBoSint® SL-N 300 ceramic exhibits optimized wear resistance due to the addition of silicon-aluminum oxynitride. Components made from this material demonstrate their advantages precisely in applications where high mechanical stress and high wear resistance are critical.
Product Highlights
- Chemically and mechanically optimized wear behavior
- High compatibility with molten metals
- Maintaining the Purity of the Melt
- good release properties
- No wetting by most molten metals
- low material weight
HeBoCoat ® PL-W 300
HeBoCoat® PL-W 300* is a water-based boron nitride coating with a solids content of 30 per cent. The boron nitride used is of high purity, has good crystallinity and a high degree of fineness, ensuring optimum surface coverage. An organic binder ensures good adhesion and good workability. Special additives improve wetting of the substrate surface and prevent rapid settling.
Typical areas of application
- Release agents for graphite in siliconisation processes
- Protection against carburisation in sintering and pressure sintering applications
- Release agents in coating processes
Product Highlights
- good surface adhesion
- optimal release and lubrication properties
- The coating is ready for use
* HeBoCoat Power Line – Wasser-BN-Gehalt ⋅10
HeBoCoat ® PL-E 125
HeBoCoat® PL-E 125* is an ethanol-based boron nitride coating containing an inorganic binder. The coating adheres very well even at high temperatures, both to metallic substrates and to glass, ceramics and graphite. Thanks to its ethanol-based formulation, the substrate surface is wetted exceptionally well, resulting in rapid drying. Furthermore, the use of pure boron nitride produces coatings with good anti-seize and lubricating properties, thereby reducing wear and contact reactions.
Typical areas of application
- Release agents for sintering, welding and brazing applications; anti-spatter
- Release agents and lubricants in glass processing
- Protection of graphite components during silicification
- Coating of crucibles, nozzles and plugs in the foundry sector
Product Highlights
- quick-drying
- Excellent separating, lubricating and protective properties, even at high temperatures
- good surface adhesion
- clean welds and solder joints
- High production output thanks to the extended service life of the plant
- greater cleanliness compared with conventional release agents
- dry lubricating film – no oils, greases or silicones
- maximum effect with economical dosing
- effective protection against metal splashes
* HeBoCoat Power Line – Ethanol BN-Content ⋅10
Advantages of Boron Nitride in Powder Metallurgy
- Clean sintering processes without reaction residues
- Extended service life of system components
- Shorter downtime due to reduced maintenance requirements
- Improved surface quality of the sintered end product
- Optimized energy efficiency through improved thermal conductivity
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Frequently Asked Questions
Why is boron nitride an ideal material for powder metallurgy?
In powder metallurgy and especially in metal atomization, work is often carried out at high temperatures, in complex atmospheres and with sensitive material systems. Boron nitride is the ideal solution for these harsh conditions, as it is extremely chemically resistant to aggressive alloy components and can even be used without extensive preheating. This ensures an excellent service life for the nozzles, even with very large casting quantities.
How do boron nitride nozzles improve the quality of the metal powder produced?
The use of special high-performance ceramics such as HeBoSint® SL-N 300 guarantees that the metal powder produced is of extremely high purity. A key technological advantage of these nozzles is that both the particle shape and the particle size distribution (PSD) can be precisely controlled and influenced during atomisation. This reliably ensures consistent, top-quality results in every single batch.
What are the economic benefits of using HeBoSint® SL-N 300 in metal atomisation?
To operate the metal atomisation process profitably and efficiently, the energy used must be utilised optimally, powder yield maximised and waste minimised. This is precisely where HeBoSint® SL-N 300 comes into its own: the nozzles enable maximum powder yields, drastically reduce unwanted waste and help to avoid long and costly downtimes or maintenance periods. Overall, this leads to significantly reduced process costs.