1. Basic properties and classification

Nickel aluminum is an intermetallic compound composed of nickel (Ni) and aluminum (Al), commonly in the form of NiAl, Ni3-Al, etc. It has a high melting point (1350 ℃), low density (3.46 g/cm ³), and excellent high-temperature oxidation resistance. Nickel aluminum alloys generally have an aluminum content of no more than 11.5%, and elements such as iron and manganese may be added to optimize their performance.

2. Production process

Composite strip: Adopting a "sandwich" structure, the interface bonding strength is enhanced through cold isostatic pressing and multiple rolling, solving the problem of low direct bonding strength between nickel and aluminum.

Coating preparation: Adjust the aluminum content through atmospheric plasma spraying or laser cladding technology to optimize the wear resistance, corrosion resistance, and bonding strength of the coating, suitable for the protection of high-temperature alloy parts.

Alloy treatment: Using sodium hydroxide solution to treat nickel aluminum alloy powder and prepare skeleton nickel catalyst requires strict control of reaction temperature and washing steps.

3. Application Fields

Catalyst: Raney nickel catalyst is used for hydrogenation and dehydrogenation reactions in the fields of petrochemicals, pharmaceuticals, etc. It has high activity and can be reused.

Protective coating: Nickel aluminum coating is used for anti-oxidation and wear-resistant protection of high-temperature components such as aircraft engines and gas turbines.

Composite materials: Nickel aluminum composite strips are used in fields such as electronics and energy to enhance material conductivity and mechanical properties.

4. Current situation and market dynamics

Price fluctuations: Nickel prices are affected by the US policy of imposing tariffs on aluminum products, leading to a rise in market risk aversion and short-term pressure, but there is room for rebound.

Technology trend: New patents focus on optimizing interface bonding strength, such as using nickel aluminum mixed powder as an intermediate layer, to promote the improvement of composite material performance.