Vacuum sintering furnace sintering materials

Vacuum sintering furnaces are widely used in the field of material sintering, especially for materials with high requirements for purity, density, and performance. Their sintered materials mainly include the following categories:

1. Metal materials
Easily oxidizable metal
Typical materials: titanium (Ti), aluminum (Al), zirconium (Zr), etc.
Advantages of sintering: Vacuum environment can effectively prevent metal oxidation at high temperatures, avoid the formation of surface oxides, and improve the mechanical properties and corrosion resistance of materials.
Application areas: aerospace (such as titanium alloy components), automotive manufacturing (high-strength lightweight components), electronics industry (high-purity metal electrodes).
High performance alloy
Typical materials: hard alloys (such as tungsten cobalt alloys, molybdenum alloys), high-temperature alloys (such as nickel based alloys).
Sintering advantages: Vacuum sintering can promote the uniform diffusion of alloy elements, reduce porosity and segregation, and improve the hardness and toughness of the alloy.
Application areas: cutting tools, wear-resistant materials, aerospace engine components.
magnetic materials
Typical materials: permanent magnetic materials (such as neodymium iron boron Nd-Fe-B), soft magnetic materials (such as iron silicon alloys).
Sintering advantage: Vacuum environment can suppress the oxidation of magnetic materials and maintain their magnetic stability.
Application areas: electronic components (such as motors, sensors), new energy (such as wind turbine magnets).

2. Ceramic materials
High performance structural ceramics
Typical materials: silicon nitride (Si ∝ N ₄), aluminum nitride (AlN), aluminum oxide (Al ₂ O ∝), zirconium oxide (ZrO ₂).
Sintering advantages: Vacuum sintering can reduce the formation of pores and oxides, improve the density, hardness, and thermal stability of ceramics.
Application areas: mechanical seals, ceramic bearings, high-temperature furnace linings, electronic packaging substrates.
functional ceramics
Typical materials: piezoelectric ceramics (such as PZT), transparent ceramics (such as YAG laser crystals).
Sintering advantage: Vacuum environment can avoid impurity doping and maintain the optical or electrical properties of ceramics.
Application areas: Ultrasonic transducers, lasers, capacitors.

3. Composite materials
Metal ceramic composite materials
Typical materials: carbon fiber reinforced metal matrix composites (such as C/Al, C/Ti), ceramic matrix composites (such as SiC/SiC).
Sintering advantage: Vacuum sintering can promote the interface bonding between metal and ceramic, improve the strength and high temperature resistance of composite materials.
Application areas: Aerospace hot end components, nuclear reactor structural materials.
Multilayer Ceramic Capacitor (MLCC) Material
Typical material: Composite material of BaTiO3 based ceramics and metal electrodes.
Sintering advantage: Vacuum sintering can avoid electrode oxidation, ensuring the reliability and stability of capacitors.
Application areas: Electronic components (such as capacitors in mobile phones and computers).

4. Special materials
High temperature superconducting materials
Typical material: Yttrium Barium Copper Oxide (YBCO) superconducting material.
Sintering advantage: The vacuum environment can accurately control the oxygen partial pressure, ensuring the crystal structure and properties of superconducting materials.
Application areas: Superconducting magnets, power transmission (such as superconducting cables).
powder coating
Typical materials: epoxy resin, polyester resin based powder coating.
Sintering advantage: Vacuum sintering can ensure coating uniformity and adhesion, avoiding bubbles and defects.
Application areas: Surface protective coatings for aviation, automotive, and home appliances.

5. Common advantages of material sintering
Inhibition of oxidation: A vacuum environment can prevent materials from reacting with oxygen at high temperatures, maintaining surface purity.
Reduce volatilization loss: By controlling the vacuum degree, the volatilization of low melting point elements (such as Zn and Pb in metals) can be reduced.
Promoting densification: Under vacuum conditions, gas escapes more thoroughly, reducing pores and increasing material density.
Accurate control of atmosphere: Inert gases (such as Ar, N ₂) or reducing gases (such as H ₂) can be filled to further optimize the sintering process.