Highly Porous Open Cell Nickel‑Chromium‑Iron Foam
مقدمة
- Nickel‑Chromium‑Iron Foam (Ni‑Cr‑Fe foam) is an open‑cell porous metal made from Ni‑Cr‑Fe heat‑resistant alloy with a 3D interconnected structure and high porosity. It provides good mechanical strength at elevated temperatures, stable electrical and thermal conductivity, and excellent oxidation and corrosion resistance in hot air, flue gas and combustion atmospheres. The large specific surface area and low density make it ideal for demanding high‑temperature and chemical environments.
- Ni‑Cr‑Fe metal foam is widely used as a catalyst support, radiant burner core, combustion element, high‑temperature gas or liquid filter, heat exchanger medium, flame stabilizer and gas distribution plate in petrochemical, metallurgy, power generation, environmental protection and thermal engineering applications. It is available in sheets or custom‑cut parts with adjustable pore size (PPI), thickness and density according to customer and reactor design requirements.
المواصفات
| النوع | Open cell Ni‑Cr‑Fe alloy foam |
| Purity / Alloy Base | Ni‑Cr‑Fe heat‑resistant alloy / stainless‑type system (similar to Ni‑Cr‑Fe stainless or heat‑resistant steels, with optimized Ni/Cr/Fe ratios for oxidation and corrosion resistance) |
| نموذج | Sheet, plate, strip, or custom‑cut blocks/parts depending on size & thickness |
| حجم الخلية (PPI) | Typically 10–80 PPI; other pore sizes can be customized on request |
| السماكة | Standard: approx. 0.5–20 mm; other thicknesses can be customized |
| الحجم والشكل | Common sheets: e.g. 100 × 100 mm / 200 × 300 mm; can be cut or formed into different shapes as per request |
| المسامية | Typically about 70% – 95%, depending on grade, PPI and density |
| معدل الخلايا المفتوحة | Usually ≥ 95% (3D interconnected open‑cell structure) |
| كثافة الحجم | Approx. 0.3–1.5 g/cm³ (adjustable by porosity and structure) |
| Surface Density | Approx. 300–6000 g/m², depending on thickness and density |
| Thermal Conductivity (Effective) | Typically around 2–25 W/m·K (strongly depends on porosity and alloy; bulk Ni‑Cr‑Fe alloys are higher, but effective value is reduced by pores) |
| Mechanical Strength (Compressive) | Typically about 2–10 MPa (varies with density, pore size and alloy composition) |
| Average Tensile Strength (N/20 mm) | Vertical ≥ 20, horizontal ≥ 15 (typical for thin, medium‑density foam strips; actual values depend on specific product) |
| Temperature Resistance (Air / Oxidizing Atmosphere) | Generally suitable for long‑term use around 800–1000 ℃ (exact limit depends on Ni‑Cr‑Fe grade and environment; Cr provides high‑temperature oxidation resistance) |
| المظهر | Metallic gray Ni‑Cr‑Fe surface, uniform color, without obvious defects such as heavy oxide scale flaking, blind holes, large through holes, severe deformation or cracks |
| Chemical Composition | Ni‑Cr‑Fe multi‑component alloy; Cr content provides oxidation and corrosion resistance, while Ni/Fe provide mechanical strength and toughness (exact composition per specific grade/standard, e.g. Ni‑Cr‑Fe heat‑resistant steels) |
| Electrical Conductivity | Good metallic electrical conductivity; effective conductivity decreases with porosity and foam structure but remains suitable for use as current collectors, heating elements and catalyst supports |
| Corrosion & Oxidation Resistance | Good to excellent oxidation resistance in air and many combustion gases; good corrosion resistance in many high‑temperature oxidizing environments; not suitable for highly reducing/halide atmospheres beyond alloy design limits |
| المرونة | Certain flexibility for thin, medium‑porosity sheets; can be slightly bent and compressed, but stiffness and brittleness increase with thickness and higher density |
| Elongation Rate (%) | Typically low compared with fully dense ductile alloys; for thin, high‑porosity foam, vertical ≈ 2–4%, horizontal ≈ 3–5% (reference values; actual data depend on grade and structure) |
| Applications | High‑temperature catalyst supports, burner and combustion elements, radiant burner cores, high‑temperature gas/liquid filters, heat exchanger media, gas distribution plates, flame stabilizers and energy‑absorbing/thermal insulation structures in petrochemical, power, metallurgy, environmental and thermal engineering fields |
البُعد (السُمك*الطول*العرض)
| 0.08 مم * 300 مم * 200 مم | 0.2 مم * 200 مم * 300 مم | 0.3 مم * 200 مم * 300 مم |
| 0.5 مم * 200 مم * 300 مم | 0.7 مم * 200 مم * 300 مم | 0.9 مم * 200 مم * 300 مم |
| 1.0 مم * 200 مم * 300 مم | 1.3 مم * 200 مم * 300 مم | 1.5 مم * 200 مم * 300 مم |
| 1.7 مم * 200 مم * 300 مم | 2.0 مم * 200 مم * 300 مم | 5 مم * 200 مم * 300 مم |
| 10 مم * 200 مم * 300 مم | 30 مم * 200 مم * 300 مم | يمكن تخصيص الحجم |
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