Nickelbaserade pulver

Nickel based powders refer to powders made from nickel or nickel alloys that are used in various applications such as additive manufacturing, surface coating, welding, and more. This article provides an overview of nickel based powders, their composition and properties, applications, specifications, pricing, comparisons, and FAQs.

Översikt av nickel based powders

Nickel based powders are metallic powders composed primarily of nickel along with alloying elements like chromium, molybdenum, tungsten, and others. Key properties that make these powders suitable for high performance applications are:

• High strength and hardness at elevated temperatures
• Utmärkt korrosions- och oxidationsbeständighet
• God slitstyrka
• Hög termisk och elektrisk ledningsförmåga
• Låg värmeutvidgningskoefficient

These powders can be produced through processes like gas or water atomization, electrolysis, carbonyl decomposition etc. in various sizes and morphologies. Common nickel alloys used are Inconel, Monel, Hastelloy, Nichrome etc.

nickel based powders Sammansättning

Nickel based powders contain nickel as the main element along with other alloying elements. Typical compositions are:

The ratio of nickel and alloys determines the key characteristics like strength, corrosion resistance, oxidation resistance, etc.

nickel based powders Fastigheter

Nickel alloy powders offer exceptional properties compared to nickel which makes them suitable for harsh environments:

Typer of nickel based powders

Nickel powders are available in different types suitable for various methods of deposition:

• Gas and water atomized allow better packing density and flowability
• Electrolytic have higher oxygen content which causes porosity
• Carbonyl nickel powder has high purity (>99% Ni)

nickel based powders Tillämpningar

Major application areas of nickel alloy powders include:

Unique properties like high strength and corrosion resistance allow nickel powders to enable critical applications.

nickel based powders Specifikationer

Nickel alloy powders are available in various sizes, morphologies and must meet composition, purity and consistency specifications for reliable performance.

Standards organizations like ASTM International provide specifications on testing methods and thresholds for nickel powders:

• ASTM B162: Standard for Nickel Plate, Sheet, Strip and Rolled Bar
• ASTM B283: Gas Atomized Nickel Powder and Powder Metallurgy Products
• ISO 4499-4: Metallic powders – Determination of oxygen and nitrogen contents by hot extraction

nickel based powders Leverantörer och prissättning

Some leading global suppliers of nickel and nickel alloy powders are:

Prissättningen varierar beroende på:

• Alloy grade: Inconel 718 > Inconel 625 > Nickel > Monel
• Particle size: Nano powder > Micro powder
• Purity levels: 99.9% Nickel > 98% Nickel
• Quantity and bulk discounts

Jämförelser

Key differences in production process lead to tradeoffs in cost, quality and performance.

Fördelar av nickel based powders

Nickel alloy powders provide unique benefits over other materials:

• Withstand high temperatures exceeding 1000°C
• Resist corrosion in acidic or alkaline environments
• Enable additive manufacturing of complex geometries
• Provide excellent bonding strength for diamond tools
• Are biocompatible for medical implants
• Have controlled expansion characteristics
• Can be recycled and reused in powder metallurgy

Begränsningar

Some drawbacks associated with these powders are:

• Expensive compared to iron or copper powders
• Sensitive to oxygen contamination during handling
• Prone to developing surface cracks if overheated
• Difficult to process by cold compaction and sintering
• Require controlled atmospheres during thermal spraying
• Lower electrical and thermal conductivity versus copper

Proper powder handling, storage and processing methods must be used to minimize limitations.

Vanliga frågor

Q: Are nickel powders hazardous?

A: Inhalation over long periods may cause respiratory sensitization. Proper PPE like masks and gloves should be worn while handling.

Q: What is the shelf life of nickel powders?

A: If stored under inert atmosphere in sealed containers, the shelf life can exceed 5 years. Oxygen and moisture absorption degrades quality over time.

Q: What particle size is best for thermal spraying?

A: 20-45 μm offers better density and bond strength. Finer powders have lower deposition efficiency.

Q: Are these magnetic or non-magnetic?

A: Pure nickel is slightly magnetic. Most nickel alloys are non-magnetic except Nichrome and MuMetal containing iron and nickel.

Q: Can nickel alloys be 3D printed?

A: Yes, Inconel and Hastelloy grades offer excellent properties but require optimized parameters for laser melting/sintering.

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