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Ni95Al5 Thermal Spray Wire / NiAl 955 / TAFA 75B Wire / AWS2.25 / Metco 8400

Thermal Spray Wire


NiAl 95/5 (Ni95Al5) thermal spray wire is a nickel aluminium alloy characterized by dense coating,high temperature oxidation resistance, heat shock resistance and scratch resistance.This wire has stable chemical composition, low oxgen and high bonding strength.The coating can also be used directly as a working layer

Supply  Size: 1.2mm /1.6mm /2.0mm /2.0mm or Customized

Product Detail

Ni95Al5 thermal spray wire is a nickel-aluminum alloy wire that is used in a variety of applications, including:

  • Wear resistance
  • Corrosion resistance
  • Heat resistance
  • Electrical conductivity
  • Abrasion resistance

The NiAl 955 alloy has a melting point of 1380°C and a tensile strength of 500 MPa. It is a relatively soft alloy, but it is very resistant to wear and corrosion. Ni95Al5 thermal spray wire is typically applied in a layer thickness of 0.1-0.15 mm.

Specific applications for Ni95Al5 thermal spray wire include:

  • Protection of turbine blades and other hot-surface components
  • Wear-resistant linings for pumps and valves
  • Corrosion-resistant coatings for marine applications
  • Electrically conductive coatings for electronic components
  • Abrasion-resistant coatings for mining and quarrying equipment

NiAl 955 thermal spray wire is a versatile and durable material that can be used in a wide range of applications. It is a good choice for applications where wear, corrosion, heat, and electrical conductivity are important factors.

Additional information about Ni95Al5 thermal spray wire:

  • The chemical composition of NiAl 955 is 95% nickel and 5% aluminum.
  • The wire is typically available in diameters of 0.5-1.0 mm.
  • The wire can be sprayed using a variety of thermal spray processes, including arc spraying, flame spraying, and HVOF spraying.
  • The coating produced by NiAl 955 thermal spray wire is typically a fine-grained, dense, and adherent layer.

How does the composition of Ni95Al5 differ from other nickel-aluminum alloys?

The composition of NiAl 955 refers to an intermetallic alloy composed of 95% nickel (Ni) and 5% aluminum (Al) by weight. This specific composition differentiates NiAl 955 from other nickel-aluminum alloys, which can have varying proportions of nickel and aluminum. The naming convention “Ni95Al5” indicates the precise stoichiometric ratio of the two elements in the alloy.

  • Nickel Content: The “Ni95” in Ni95Al5 denotes that the alloy contains 95% nickel. Other nickel-aluminum alloys may have different nickel percentages, which can significantly impact their properties. For example, some alloys may have higher nickel content, resulting in different mechanical, thermal, and magnetic properties.
  • Aluminum Content: The “Al5” in Ni95Al5 indicates that the alloy contains 5% aluminum. The aluminum content in other nickel-aluminum alloys may vary, and altering the aluminum percentage can influence the alloy’s behavior in terms of strength, ductility, and resistance to high-temperature environments.
  • Stoichiometric Ratio: The stoichiometric ratio of NiAl 955 is 19:1, meaning that there are 19 atoms of nickel for every one atom of aluminum in the crystal structure. Other nickel-aluminum alloys will have different stoichiometric ratios based on their composition.
  • Specific Properties: The specific properties of Ni95Al5 are a result of its unique composition. Nickel-aluminum alloys with different compositions will exhibit varying levels of hardness, brittleness, thermal expansion, electrical conductivity, and corrosion resistance.
  • Phase Stability: The ratio of nickel to aluminum can influence the phase stability of the alloy at different temperatures. In some nickel-aluminum alloys, changes in composition can lead to the formation of different phases or crystal structures.
Al Mn Fe Ni Si Cu C Ti
4.5-5.5 ≤0.3 ≤0.3 Bal. ≤ 0.5 ≤0.08 ≤ 0.005 ≤ 0.3
Density (g/cm3) Electrical resistivity at 20ºC(mm2/m)
8.2 0.42
Coating Harness Coating Strength Deposit Rate Deposit Efficiency Machilityineab
23-25 HRC 65-68Mpa 10 lbs /hr/100A 60-70% Good

NiAl 955 is a thermal spray wire composed of 95% nickel (Ni) and 5% aluminum (Al). It is commonly used in thermal spray processes, such as flame spraying or arc spraying, to provide protective coatings or surface enhancements for various applications. The wire is typically in a continuous spooled form and is fed into a thermal spray gun, where it is heated and propelled onto the substrate to create a coating.

Some key features and benefits of Ni95Al5 thermal spray wire include:

  1. Oxidation Resistance: The presence of aluminum in the alloy provides excellent oxidation resistance. When sprayed onto a substrate, the coating formed by NiAl 955 wire creates a protective barrier that helps protect the underlying material from high-temperature oxidation.

  2. Bond Strength: Ni95Al5 wire produces coatings with good bond strength to the substrate. The combination of nickel and aluminum promotes strong adhesion, ensuring the coating adheres well to the surface and provides effective protection.

  3. Corrosion Resistance: The nickel-aluminum composition of Ni95Al5 wire offers corrosion resistance properties, making it suitable for protecting components exposed to corrosive environments.

  4. Thermal Barrier: The coating formed by NiAl 955 wire acts as a thermal barrier, providing insulation and reducing heat transfer between the substrate and the surrounding environment. This feature is beneficial for applications where thermal insulation or temperature control is required.

  5. Wear Resistance: The sprayed coatings formed by Ni95Al5 wire exhibit good wear resistance properties, making them suitable for applications where the coated surface needs to withstand abrasive wear or erosion.

Applications of Ni95Al5 thermal spray wire include:

  • Gas turbine components: The wire is often used to protect gas turbine components, such as blades, vanes, and combustion chambers, from high-temperature oxidation and corrosion.

  • Aerospace industry: NiAl 955 wire coatings are applied to aerospace components to enhance their resistance to high-temperature environments and corrosive gases.

  • Industrial applications: The wire is used to protect equipment and machinery subjected to extreme temperatures, such as furnaces, boilers, and heat exchangers.

  • Automotive industry: NiAl 955 wire coatings can be applied to exhaust systems and other components to improve corrosion resistance and extend their service life.

It’s important to note that specific application requirements and spray parameters may vary, and it’s advisable to consult with thermal spray experts or manufacturers for detailed recommendations on the use of Ni95Al5 wire for specific applications.

The role of NiAl 955 in high-temperature environments and its resistance to oxidation is a topic of significant interest in the field of materials science and engineering. NiAl 955, also known as NiAl-5, is an intermetallic compound composed of 95% nickel (Ni) and 5% aluminum (Al). This unique composition gives rise to a range of properties that make Ni95Al5 particularly suitable for applications in extreme temperature conditions.

Oxidation Resistance: 

One of the most remarkable features of NiAl 955 is its exceptional resistance to oxidation at elevated temperatures. When exposed to high-temperature environments, many materials can undergo oxidation, a process in which they react with oxygen to form oxides on their surface. This can lead to material degradation, reduced mechanical strength, and compromised performance. However, Ni95Al5 forms a protective alumina (Al2O3) oxide layer on its surface when exposed to oxygen. This oxide layer acts as a barrier, preventing further oxidation and protecting the underlying material from damage. This property makes Ni95Al5 an ideal candidate for applications in environments with high temperatures and oxygen exposure.

High-Temperature Stability: 

Ni95Al5 exhibits remarkable stability and mechanical strength even at elevated temperatures. This stability is attributed to the formation of ordered intermetallic structures within the alloy’s microstructure. These ordered structures lend NiAl 955 its exceptional thermal stability and resistance to creep—a phenomenon where materials deform slowly under constant load at high temperatures. This combination of oxidation resistance and high-temperature stability makes Ni95Al5 a favored choice for components subjected to extreme heat, such as those used in gas turbine engines and aerospace applications.

Maintenance of Ni95Al5

Ni95Al5, also known as NiAl or nickel aluminide, is an intermetallic compound composed of nickel (Ni) and aluminum (Al). It is used in various high-temperature and corrosion-resistant applications, such as gas turbine engines, due to its excellent properties. Here are some maintenance considerations for NiAl 955 components:

  1. Regular Inspection: Periodic inspections are essential to assess the condition of Ni95Al5 components. Inspect for signs of wear, corrosion, or damage. Visual inspections, along with non-destructive testing methods like ultrasonic testing and radiographic testing, can be used to detect any flaws or defects.

  2. Corrosion Protection: NiAl 955 is known for its excellent corrosion resistance, particularly at high temperatures. However, it’s still important to protect components from aggressive environments whenever possible. Use protective coatings or barriers if necessary.

  3. Cleaning: Depending on the specific application, Ni95Al5 components may accumulate dirt, debris, or contaminants over time. Regular cleaning is essential to maintain their performance. Use appropriate cleaning methods and solvents that won’t damage the material.

  4. Temperature Management: NiAl 955 components are often exposed to high temperatures, especially in gas turbine engines. Ensure that the operating temperatures are within the material’s design limits. Overheating can lead to degradation and reduced performance.

  5. Stress Management: Ni95Al5 can be susceptible to mechanical stresses, including thermal cycling and vibration, in certain applications. Monitor stress levels and take measures to minimize them, such as using proper support structures or thermal management systems.

  6. Material Compatibility: NiAl 955 may interact with other materials in its environment, potentially leading to chemical reactions or corrosion. Ensure that any materials in contact with NiAl 955 are compatible, and consider using protective coatings or barriers to prevent adverse reactions.

  7. Crack Detection: NiAl 955 components can be susceptible to cracking, especially under extreme conditions. Regularly inspect critical areas for cracks using appropriate testing methods like dye penetrant inspection or eddy current testing.

  8. Repair and Replacement: If any Ni95Al5 components are found to be damaged or degraded beyond acceptable limits during inspections, consider repairing or replacing them. Ensure that repairs are carried out by qualified personnel using approved methods and materials.

  9. Documentation: Maintain detailed records of the maintenance and inspection history of NiAl 955 components. This documentation can help track component life and performance over time.

  10. Training: Ensure that maintenance personnel are trained and qualified to work with Ni95Al5 components. Proper handling, repair, and inspection procedures are crucial for maintaining component integrity.

Keep in mind that the specific maintenance requirements for NiAl 955 components can vary depending on their application and operating conditions. It’s essential to follow the manufacturer’s guidelines and consult with experts in materials and maintenance to develop a comprehensive maintenance plan tailored to your specific needs.