Metallpulver med hög renhet

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High purity metal powders refer to metals processed into fine particulate form while minimizing contamination from oxygen, nitrogen, carbon, and other elements. Maintaining ultra-low impurity levels allows manufacturing of products like electronic conductors, magnetic materials, superalloys, and welding wires with tightly controlled chemistry.

Applications range from 3D printing to electronics to aerospace components. Typical high purity metals include nickel, cobalt, copper, aluminum alloys, as well as refractory metals like tungsten, molybdenum, and tantalum. Both elemental metals and master alloys with addition of alloying elements are covered at purity levels exceeding 99%.

High Purity Metal Powder Types

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Key techniques for producing pure metal powders include:

• Elektrolys: Used for Cu, Zn, Ni. Electroplating deposits pure metal onto cathodes which is scraped off as powder.
• Karbonylprocessen: Used for Ni, Fe, Co. Metal is volatized from ore using CO gas then decomposed to powder.
• Atomisering: Used for Al, Mg, Ti alloys. Rapid solidification of molten metal forms powder upon gas or water atomization.
• Vätgasreduktion: Used for W, Ta, Nb, Mo. Metal oxides heated in H2 gas causes oxygen removal leaving pure powders.
• Plasmaatomisering: Used for reactive metals like Ti, Zr. Water interactions avoided by using plasma gas instead of water.
• Smältning med elektronstråle: Used for Ti, Ta. High purity ingots levitated in vacuum melted by an electron beam then rapidly solidified by dropping through chamber.

High Purity Metal Powder Characteristics

Applications of High Purity Metal Powders

Benefits of High Purity Metal Powders

Using high purity metal powders enables:

• More consistent chemistry and microstructure batch-to-batch
• Achievement of electrical, magnetic, mechanical, and corrosion targets
• Lower contamination risks
• Attainment of strict aerospace and medical device standards
• Improved product performance and lifespans
• High value component production justifying increased powder cost
• Design flexibility – customize alloy ratios and powder attributes as needed

Challenges With High Purity Metal Powders

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A cost comparison of Regular Grade vs High Purity nickel powder suitable for additive manufacturing is shown below:

Despite the higher cost, industries like aerospace rely exclusively on high purity powder even for prototype builds to prevent quality issues in final application.

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Some leading suppliers offering high purity metal powders for industries like additive manufacturing include:

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Key specifications relating to high purity metal powders include:

These help ensure repeatable feedstock suited for demanding applications in aerospace, medical, electronics fields.

High Purity vs Regular Powders

So while high purity powders carry a significant price premium, their unmatched consistency and standards conformance justify use in mission-critical applications where product performance directly correlates with powder quality.

Vanliga frågor

Sammanfattning

High purity metal powders with minimized oxygen, nitrogen and other impurities enable fabrication of components meeting strict aerospace, defense, medical, electronics and nuclear applications. Maintaining elemental chemistry control below 100 ppm ensures reliable electrical, mechanical, and corrosion performance. Common high purity metals include nickel, cobalt, aluminum alloys and refractory metals like tungsten or tantalum. While cost per unit mass is 4X to 10X higher than conventional powders, high purity materials are essential for mission-critical parts where product quality directly correlates with powder quality starting from raw material. With continual improvements in purity reaching beyond 99.999%, high purity metal powders will enable the next generation of components powering electric vehicles, spacecraft, satellites, and medical devices.

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