Suoyi ZTA (Zirconia Toughened Alumina) thermal spray powder

ZTA (Zirconia-Toughened Alumina) Thermal Spray Powder

ZTA Thermal Spray Powder
Zirconia-Toughened Alumina (ZTA) Thermal Spray Powder

Abbreviation: ZTA Thermal Spray Powder
Matrix: α-Al₂O₃ (high hardness, wear resistance, and corrosion resistance)
Toughening Phase: Y₂O₃-stabilized ZrO₂ (typically 10 wt%, 15 wt%, 20 wt%, or 25 wt%)
Minor Additives: MgO, TiO₂, etc.
Form: Agglomerated and granulated powder (via spray granulation); optimized for high flowability, suitable for HVOF and Atmospheric Plasma Spraying (APS).

Transformation Toughening: At the crack tip, tetragonal ZrO₂ transforms into monoclinic ZrO₂; the resulting volume expansion arrests crack propagation, providing significantly higher toughness than pure alumina coatings.
Features: High hardness, resistance to particle erosion, resistance to acid/alkali corrosion, and excellent electrical insulation.
Superior thermal shock resistance compared to pure alumina coatings; less prone to large-scale spalling or delamination.
Common Thermal Spray Processes
HVOF (High-Velocity Oxy-Fuel) Spraying: Produces higher density and lower porosity; offers the best wear resistance (highly recommended).
APS (Atmospheric Plasma Spraying): Cost-effective; suitable for large-area anti-corrosion and wear-resistant coatings.
Not suitable for arc spraying.
Typical Applications (Coating Service Conditions)
Pump shafts, agitator shafts, sealing surfaces, valve seats, and valve cores.
Linings for powder transport pipelines, chutes, and cyclone separators (erosion resistance).
Textile rollers, cutting blades for lithium-battery separators, and wear-resistant roll surfaces.
Wear-resistant, anti-corrosive, and insulating coatings for the metallurgical and petrochemical industries.

ZTA10, ZTA15, ZTA20, ZTA25
Particle Size: -45+15 μm / -53+20 μm (standard particle size ranges for thermal spraying)
Spherical agglomerated powder
25 kg/drum, palletized
Purity ≥99%
YSZ: Mainly heat insulation, wear resistance is weaker than ZTA

ZTA (Zirconia Toughened Alumina) thermal spray powder, spray-dried agglomerated composite powder for HVOF & APS. Balanced high hardness and fracture toughness, excellent wear, erosion and corrosion resistance for mechanical seal, pump shaft, chute lining.