Nickel 59/Aluminum 41 Alloy,Ni41AI Alloy,Nickel Aluminum Alloy,E FORU

### **Nickel-Aluminum Alloy (Ni₅₉Al₄₁) - Nickel Aluminide Intermetallic Compound** #### **Overview** **Nickel-Aluminum Alloy with composition Ni₅₉Al₄₁** represents a nickel-rich nickel aluminide intermetallic compound based on the NiAl phase with B2 crystal structure. This specific composition falls within the single-phase NiAl region of the Ni-Al phase diagram, offering an optimal balance of high-temperature strength, oxidation resistance, and relatively better fabricability compared to stoichiometric NiAl. As an ordered intermetallic compound, it maintains long-range atomic ordering up to its melting point, providing exceptional thermal stability and mechanical properties retention at elevated temperatures. --- #### **Chemical Composition (Atomic % / Weight %)** | Element | Atomic % | Weight % (Approx.) | | :--- | :--- | :--- | | **Nickel (Ni)** | **57-61%** | **~78-82%** | | **Aluminum (Al)** | **39-43%** | **~18-22%** | | **Minor Additives** | **< 0.5%** | **< 0.5%** | *Typical minor additions may include Y, Hf, Zr, or Cr to improve oxide scale adherence and high-temperature creep resistance.* --- #### **Physical & Mechanical Properties** | Property | Value / Description | | :--- | :--- | | **Density** | **6.05-6.15 g/cm³** (Significantly lower than superalloys) | | **Melting Point** | **~1580-1640 °C** (2876-2984 °F) | | **Crystal Structure** | Ordered B2 (CsCl-type) | | **Thermal Conductivity** | **25-35 W/m·K** (at room temperature) | | **Specific Heat Capacity** | 450-500 J/kg·K | | **Coefficient of Thermal Expansion** | 14.0-15.0 × 10⁻⁶/°C (20-1000°C) | | **Elastic Modulus** | 220-250 GPa | | **Vickers Hardness** | 300-400 HV | | **Compressive Yield Strength (RT)** | 800-1200 MPa | | **Tensile Ductility (RT)** | **1-3%** (Highly dependent on processing) | | **High-Temperature Strength** | Excellent retention up to **1100-1200 °C** | | **Oxidation Resistance** | **Outstanding** - forms protective Al₂O₃ scale | --- #### **Key Characteristics & Applications** **Key Characteristics:** 1. **Exceptional High-Temperature Strength**: Maintains mechanical integrity at temperatures where conventional superalloys soften 2. **Outstanding Oxidation Resistance**: Forms a continuous, slow-growing alumina scale for protection up to 1300°C 3. **Low Density Advantage**: Approximately 2/3 the density of typical nickel-based superalloys 4. **High Thermal Conductivity**: Better heat dissipation capability than superalloys 5. **Limited Room-Temperature Ductility**: Typical challenge of intermetallics, addressed through microalloying and processing **Typical Applications:** - **Aerospace Components**: Turbine blades, vanes, and other hot-section components in advanced jet engines - **Power Generation**: Stationary gas turbine components for improved efficiency - **Industrial Heating**: Heating elements, furnace fixtures, and heat treatment hardware - **Protective Coatings**: Bond coats in thermal barrier coating systems - **Advanced Composites**: Matrix material for high-temperature composites - **Chemical Processing**: Components requiring corrosion resistance at elevated temperatures --- #### **Manufacturing & Processing** | Method | Description | Challenges | | :--- | :--- | :--- | | **Vacuum Induction Melting** | Conventional melting and casting | Limited room-temperature ductility | | **Powder Metallurgy** | Gas atomization + HIP | Cost-effective for complex shapes | | **Directional Solidification** | Improved high-temperature properties | Microstructural control | | **Additive Manufacturing** | Laser powder bed fusion | Crack prevention during processing | --- #### **International Standards & Specifications** | Category | Designation | Description | | :--- | :--- | :--- | | **Research Codes** | **Ni59Al41** | Academic and research nomenclature | | **Aerospace** | **OEM Specifications** | Proprietary specifications from engine manufacturers | | **ASTM** | **Custom Alloy Standards** | Application-specific material standards | | **ISO** | **Under Development** | Emerging standards for advanced intermetallics | *Note: As an advanced engineered material, Ni₅₉Al₄₁ is typically covered by proprietary specifications rather than generic international standards. Major aerospace OEMs (GE Aviation, Rolls-Royce, Pratt & Whitney) maintain their own material specifications for nickel aluminide components.* --- #### **Summary** **Nickel 59/Aluminum 41 Alloy (Ni₅₉Al₄₁)** represents an advanced nickel aluminide intermetallic compound offering an exceptional combination of high-temperature capability, oxidation resistance, and lightweight characteristics. While challenges remain in room-temperature ductility and fabrication, ongoing research in processing technologies and microalloying continues to expand its practical applications. The alloy's unique properties make it particularly valuable for aerospace and power generation applications where operating temperatures exceed the capabilities of conventional superalloys, contributing to improved efficiency and performance in extreme environments.

Packing of Standard Packing: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 3214 gallon liquid totes Special package is available on request.