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Welding Cap
Printed Circuit Board Motor
Power Cable
Img source: Luvata, Nitrode®
Swedish company, World's largest producer of powdered metals.
Glidcop, first use in commerce:1973
Ref. Höganäs AB, SCM Metal Products, Inc . Glidcop product info
• What is DSC ? – Mechanism & microstructures.
– Properties
• Processing
• Current & Future
• Summary
Properties
Micro-structures
Processing
Applications
Printed Circuit Board
Welding Cap
Motor
Power Cable
Img source: Luvata, Nitrogen®
• Strengthening Mechanisms
– Solid solution strengthening
– Strain Hardening
– Grain size refinement
– Precipitation hardening
– Dispersion strengthening
– Phase transformation Comparison of copper cladding and extruded Glidcop (33x; longitudinal)
Al2O3
Ref. DeGarmo’s Materials and Processes in Manufacturing
ASTM/UNS Number
Al2O3
Content wt%
Melting point ℃
Density g/cm3
Electrical Conductivity %IACS
Tensile Strength MPa
Oxygen Free Copper C10200 0 1083 8.94 101 400
Glidcop Al-15 C15715 0.28 1083 8.90 92 483
Glidcop Al-25 C15725 0.46 1083 8.86 87 524
Glidcop Al-60 C15760 1.12 1083 8.81 78 627
Ref. Glidcop product info, Kuen-Shyang Hwang, 粉末冶金學,2008
• Mechanical Alloying
– Cu + Al2O3
– Cu + Al + internal oxidation – Cu + Cu2O + Al + internal oxidation
• Pre-alloyed Powder
– Cu-Al pre-alloyed powder + internal oxidation
®
Mechanical Alloying
Cu vessel
Cu-Al alloy
1. Cu-Al alloy is atomized to produce fine alloy powders
2. Encapsulated.
Cu billet
3. Sealed.
Cu billet
4. Heated up 925 under oxidizing atmosphere to selectively oxdize Al in-situ.
6. Glidcop with Cu cladding !
extrusion
5. Extruded to get full density, can be further CW into desired size.
• Other dispersion particles
– Nb, Mo, Cr2Nb
• finer powders
– Using NPs can obtain higher strength.
– finer grains enhanced GB strengthening.
• Other processing
Ref. D.S. Zhou, D.L. Zhang, C. Kong, P. Munroe, Factors controlling the tensile properties of ultrafine structured Cu–5vol%Al2O3 nanocomposite prepared by high energy mechanical milling and powder compact extrusion, Materials Science and Engineering: A, Volume 584, 1 November 2013, Pages 67-72, ISSN 0921-5093, Groza, J. R., and J. C. Gibeling. "Principles of particle selection for dispersion-strengthened copper." Materials Science and Engineering: A 171.1 (1993): 115-125.
• DS copper is mainly used in places where needed high T strength and good conductivity, such as welding cap and PCB.
• Strength will increase with the amount of dispersion particles, while conductivity will decrease with it.
• Al2O3 is the most used dispersion particle since 1973, which is known for GlidCop® , made by Höganäs AB.
• 1. SCM Metal Products, Inc . Glidcop product info
• 2. DeGarmo, Materials and Processes in Manufacturing
• 3. Kuen-Shyang Hwang, 粉末冶金學,2008
• 4.D.S. Zhou, D.L. Zhang, C. Kong, P. Munroe, Factors controlling the tensile properties of ultrafine structured Cu–5vol%Al2O3 nanocomposite prepared by high energy mechanical milling and powder compact extrusion, Materials Science and Engineering: A, Volume 584, 1 November 2013, Pages 67-72, ISSN 0921-5093,
• 5.Groza, J. R., and J. C. Gibeling. "Principles of particle selection for dispersion-strengthened copper." Materials Science and Engineering: A 171.1 (1993): 115-125.
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