Ni/Al2O3 Composite
75/25 and 25/75 Ni-clad alumina with certified clad integrity. Wear spray coatings, MMC reinforcement, abrasive tool grains. Custom ceramic cores on request.
QUICK ANSWER
Nickel-coated alumina powder is a metal-ceramic composite with alumina (Al2O3) cores clad in continuous nickel shells (typically 25/75 to 75/25 Ni/Al2O3), produced by chemical plating. It bridges metals and ceramics: the nickel shell lets ceramic cores bond into metallic coatings and matrices — serving wear-resistant thermal spray coatings, metal-matrix composites, abrasive tools, and conductive ceramic fillers.
Alumina is hard, cheap, and ceramic — which means metals cannot wet or bond it. The nickel shell solves this: sprayed or sintered, the nickel carries the alumina into metallic coatings where the ceramic contributes wear resistance and the metal provides toughness and bondability. Spray shops use nickel-clad alumina for wear coatings tougher than plain metals but more forgiving than pure ceramics; composite makers use it to build aluminum- and nickel-matrix composites with ceramic reinforcement; and tool makers use metal-clad ceramics where bare ceramic grains pull out of their bonds.
MATERIAL DATA
Lot-level controls focus on the chemistry, particle characteristics, and process values that influence manufacturing consistency and finished-part performance.
| Element | Content | Performance Role |
|---|---|---|
| Nickel shell (Ni) | 25-75 wt% (grade) | Wettable, bondable metal cladding — carries the ceramic into metallic systems |
| Alumina core (Al2O3) | Balance | Hard (1800 HV) wear-resistant ceramic core |
| Coating integrity | > 90% coverage | Shell continuity for consistent bonding |
| Alumina phase | Alpha-Al2O3 | Stable hard corundum phase |
| Particle size | 45-106 µm (spray), 5-45 µm (composites) | Application-matched cuts |
Final limits can be aligned with the agreed purchase specification.
APPLICATIONS
Thermal spray wear coatings are the established market: nickel-clad alumina sprays (flame or plasma) into coatings that resist abrasive wear on pump components, valve parts, and machinery surfaces where pure metal coatings wear too fast and pure ceramic coatings are too brittle or expensive. The 75Ni/25Al2O3 grade sprays like a nickel alloy with a wear bonus; higher-ceramic ratios trade sprayability for hardness. Coatings shops buy on clad integrity and lot consistency, often as the economic middle option in their wear-coating portfolio.
Metal-matrix composites and tooling form the development market: nickel-coated alumina reinforces aluminum and nickel MMCs (the nickel shell solves the wetting problem that makes bare alumina impossible to incorporate); metal-clad ceramic grains serve in abrasive tools and wear parts where grain retention in metal bonds is the failure mode; and conductive-ceramic research (shielding, heating elements) uses the nickel shell's conductivity. These are engineering-driven purchases where the supplier's plating-quality data and application support matter as much as the powder.
SPECIALTY & COMPOSITE POWDERS
CUSTOM SUPPLY
We supply nickel-coated alumina in 75/25 and 25/75 ratios across spray and composite cuts, with certified clad integrity per lot. Custom ratios, alternative cores (zirconia, silica, silicon carbide) on the same plating platform, and application development support for MMC and tooling programs are available. Not export-controlled.
We supply nickel-coated alumina in 75/25 and 25/75 ratios across spray and composite cuts, with certified clad integrity per lot.
Custom ratios, alternative cores (zirconia, silica, silicon carbide) on the same plating platform, and application development support for MMC and tooling programs are available.
MATERIAL COMPARISON
| Comparison Point | This Product | Mechanical Blend |
|---|---|---|
| Mix uniformity | Fixed at particle level | Segregates in handling and feeding |
| Spray deposit consistency | Uniform ceramic distribution | Variable — streaks and lean zones |
| Ceramic retention in coating | High — Ni anchors each core | Losses — ceramic bounces off |
| Feeder behavior | Flows as one material | Differential flow of two materials |
| Cost | Moderate premium | Lowest |
| Best use | Production coatings, MMCs | Rough shop trials only |
TECHNICAL FAQ
Need a different chemistry, particle range, or processing route? Our material team can review the requirement and supply window.
75Ni/25Al2O3 for maximum toughness with meaningful wear improvement — the workhorse grade. 25Ni/75Al2O3 pushes hardness higher at reduced sprayability and toughness. Start with the nickel-rich grade unless abrasion is extreme.
Yes — our plating platform handles zirconia, silicon carbide, silica, and glass cores. Custom core materials for specific MMC or tooling programs are a standard development service.
Above 90 percent coverage certified per lot by microscopic analysis — bare ceramic spots break the bonding chain in both spraying and MMC processing, so coverage is the parameter we control tightest.
Yes — that is a core application. The nickel shell provides the metal-to-metal bond path that bare alumina lacks; typical practice stirs or infiltrates the clad powder into the aluminum matrix with documented interface quality.
No. Metal-ceramic composite powders ship without licensing requirements.
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REQUEST THIS GRADE
Share your target chemistry, particle size, process, annual volume, and destination. Our powder specialists will confirm the closest production grade and documentation package.
