Aluminum-Silicon / Polymer Composite Abradable Powder (AlSi/Polyester)
AlSi/Polyester composite powder is thermal-spray feedstock for abradable clearance-control coatings: the fugitive polymer phase burns out in service, leaving a porous aluminum-silicon skeleton that sacrifices itself rather than damaging the mating blade tip.
~40 wt% polyesterCoating Content
-125+11 µmParticle Size Range
Custom Made-to-OrderGrade, Size & Quantity
WorldwideExport Shipping
Aluminum-Silicon / Polymer Composite Abradable Powder — Grades & Specifications
Aluminum-Silicon / Polymer Composite Abradable Powder (AlSi/Polyester) powder is supplied across a range of grades, particle sizes and coating ratios. The options below are typical; specify your target values in the request form and we will confirm availability, lead time and pricing.
| Material | Aluminum-Silicon / Polymer Composite Abradable Powder (AlSi/Polyester) |
|---|---|
| Category | Polymer-Coated Powder |
| Core material | Aluminum-silicon alloy (Al balance, 6-9 wt% Si) |
| Coating / shell material | Polyester (fugitive polymer phase; some grades use polyimide) |
| Coating content | Approximately 40 wt% polyester on common grades; higher-temperature grades use roughly 20-47 wt% polyester or polyimide, sometimes with a small boron nitride addition |
| Particle size | Typically -125+11 um; some grades run -149+11 um |
| Morphology | Irregular, rounded composite particles — either mechanically clad (polymer bonded onto AlSi core particles) or physically blended |
| Appearance | Gray/silver metallic powder |
| Max. Service Temperature | Rated up to approximately 325°C (615°F) on standard grades, with higher-temperature polyimide-modified grades rated to roughly 345-350°C; the polymer phase burns out in service, leaving a porous, low-shear-strength skeleton that abrades preferentially against blade tips |
| Typical applications | Gas Turbine Compressor Clearance Control, Aircraft Engine Low-Pressure Compressor Seals, Turbocharger Shroud Coatings, Industrial Gas Turbine Casing Seals |
Applications by Industry
Gas Turbine Compressor Clearance ControlSprayed onto compressor casings to allow blade tips to cut a tight running clearance without blade damage.
Aircraft Engine Low-Pressure Compressor SealsReduces air leakage past rotating blades, improving engine efficiency and fuel burn.
Turbocharger Shroud CoatingsClearance control against untipped titanium, nickel-alloy or steel turbo blades.
Industrial Gas Turbine Casing SealsAbradable linings in land-based turbines for clearance optimization.
APU Compressor SealsSame rub-tolerant clearance function in smaller aerospace auxiliary power units.
Centrifugal Compressor Labyrinth Seal ReplacementAbradable coating substitutes for or supplements labyrinth seals to reduce leakage in industrial compressors.
Particle Size & Mesh Conversion
Reference for converting between US mesh and microns/millimetres. Figures are nominal sieve openings and may vary slightly by standard.
| Mesh (US) | Micron (µm) | mm | Inch | Remarks |
|---|---|---|---|---|
| 3 | 6730 | 6.730 | 0.2650 | |
| 4 | 4760 | 4.760 | 0.1870 | |
| 5 | 4000 | 4.000 | 0.1570 | |
| 6 | 3360 | 3.360 | 0.1320 | |
| 7 | 2830 | 2.830 | 0.1110 | |
| 8 | 2380 | 2.380 | 0.0937 | |
| 10 | 2000 | 2.000 | 0.0787 | |
| 12 | 1680 | 1.680 | 0.0661 | |
| 14 | 1410 | 1.410 | 0.0555 | |
| 16 | 1190 | 1.190 | 0.0469 | |
| 18 | 1000 | 1.000 | 0.0394 | |
| 20 | 841 | 0.841 | 0.0331 | |
| 25 | 707 | 0.707 | 0.0278 | |
| 30 | 595 | 0.595 | 0.0234 | |
| 35 | 500 | 0.500 | 0.0197 | |
| 40 | 420 | 0.420 | 0.0165 | |
| 45 | 354 | 0.354 | 0.0138 | |
| 50 | 297 | 0.297 | 0.0117 | |
| 60 | 250 | 0.250 | 0.0098 | |
| 70 | 210 | 0.210 | 0.0083 | |
| 80 | 177 | 0.177 | 0.0070 | |
| 100 | 149 | 0.149 | 0.0059 | |
| 120 | 125 | 0.125 | 0.0049 | |
| 140 | 105 | 0.105 | 0.0041 | |
| — | 100 | 0.100 | 0.0039 | Sand |
| 170 | 88 | 0.088 | 0.0035 | |
| 200 | 74 | 0.074 | 0.0029 | |
| — | 70 | 0.070 | 0.0027 | |
| 230 | 63 | 0.063 | 0.0024 | Human hair |
| — | 55 | 0.055 | 0.00217 | |
| 270 | 53 | 0.053 | 0.0021 | |
| — | 50 | 0.050 | 0.00197 | |
| 325 | 44 | 0.044 | 0.0017 | |
| — | 40 | 0.040 | 0.00157 | |
| 400 | 37 | 0.037 | 0.0015 | |
| 550 | 25 | 0.025 | 0.00099 | |
| 625 | 20 | 0.020 | 0.00079 | |
| 1200 | 12 | 0.012 | 0.0005 | |
| 1250 | 10 | 0.010 | 0.000394 | |
| — | 7 | 0.007 | 0.000276 | |
| 2500 | 5 | 0.005 | 0.000197 | |
| 4800 | 3 | 0.003 | 0.000118 | |
| 5000 | 2.5 | 0.0025 | 0.000099 | Bacteria (approx.) |
| 12000 | 1 | 0.001 | 0.0000394 |
Information Required for Quotation
- Grade or type
- Particle size (micron or mesh)
- Coating content / core-shell ratio
- Quantity
- Application environment
- Required delivery country
Lead time depends on grade, particle size, quantity and processing requirements. Export availability can be reviewed based on destination country and material type. A Certificate of Analysis can be provided on request.
Request a Quote or Custom Order
Tell us your grade, particle size and quantity. We typically reply within one business day.
Frequently Asked Questions
What is the coating content of Aluminum-Silicon / Polymer Composite Abradable Powder?
Approximately 40 wt% polyester on common grades; higher-temperature grades use roughly 20-47 wt% polyester or polyimide, sometimes with a small boron nitride addition Other coating ratios can be reviewed on request depending on your application and quantity.
What particle sizes can you supply?
Typically -125+11 um; some grades run -149+11 um Mesh-based requirements are also accepted; a mesh-to-micron conversion reference is provided on the page.
Can Aluminum-Silicon / Polymer Composite Abradable Powder be made to custom specifications?
Yes. Aluminum-Silicon / Polymer Composite Abradable Powder is produced to order — core/shell ratio, particle size, morphology and packaging can be customized to your specification. Select “Custom Order” in the request form and provide your target values.
What is the minimum order quantity (MOQ)?
Order quantity is flexible and small quantities and prototype requests are welcome. Please state your required quantity in the form for an accurate quotation.
Can you export and ship Aluminum-Silicon / Polymer Composite Abradable Powder internationally?
Yes, export inquiries are welcome. Availability and shipping are reviewed based on destination country, grade and quantity.
Do you provide a Certificate of Analysis (COA) or technical data?
A Certificate of Analysis and technical data can be provided on request for supplied lots.
Related Products
Request a Quote for Aluminum-Silicon / Polymer Composite Abradable Powder
Send us your grade, particle size, quantity and application. We will review availability, quotation and lead time. Small quantities, prototypes and custom made-to-order specifications are welcome.