The Copper Universe
Follow
1.2K views | +0 today
The Copper Universe
Stories about the World's First Metal
Your new post is loading...
Scooped by Hans De Keulenaer
Scoop.it!

One hundred fold increase in current carrying capacity in a carbon nanotube-copper composite

One hundred fold increase in current carrying capacity in a carbon nanotube-copper composite | The Copper Universe | Scoop.it

Increased portability, versatility and ubiquity of electronics devices are a result of their progressive miniaturization, requiring current flow through narrow channels. Present-day devices operate close to the maximum current-carrying-capacity (that is, ampacity) of conductors (such as copper and gold), leading to decreased lifetime and performance, creating demand for new conductors with higher ampacity. Ampacity represents the maximum current-carrying capacity of the object that depends both on the structure and material. Here we report a carbon nanotube–copper composite exhibiting similar conductivity (2.3–4.7 × 105Scm−1) as copper (5.8 × 105Scm−1), but with a 100-times higher ampacity (6 × 108Acm−2). Vacuum experiments demonstrate that carbon nanotubes suppress the primary failure pathways in copper as observed by the increased copper diffusion activation energy (~2.0eV) in carbon nanotube–copper composite, explaining its higher ampacity. This is the only material with both high conductivity and high ampacity, making it uniquely suited for applications in microscale electronics and inverters.

more...
No comment yet.
Scooped by Hans De Keulenaer
Scoop.it!

Transformer failure at Copper Mountain is an 'unfortunate event'

Transformer failure at Copper Mountain is an 'unfortunate event' | The Copper Universe | Scoop.it

A transformer failure reported on Thursday at Copper Mountain Mining (TSE:CUM) will limit production to 24,000 tonnes per day for about the next four weeks.

The company says that one of the two ABB transformers powering the SAG mill motors failed. A transformer from a ball mill is being moved over to the SAG mill. The SAG mill is scheduled to be back in production by this Saturday.

"As part of the original design of the concentrator, the SAG mill and two ball mills have identical motors and transformers that are interchangeable in the event of a component failure."

more...
No comment yet.
Scooped by Hans De Keulenaer
Scoop.it!

IBM makes stop-motion film using atoms as pixels

IBM makes stop-motion film using atoms as pixels | The Copper Universe | Scoop.it

IBM has made a stop-motion film -- A Boy and His Atom -- using individual molecules as pixels, in what Guinness has acknowledged is the world’s smallest movie.

IBM moved the molecules using two of its own scanning tunnelling microscopes. It's a huge machine that weighs two tonnes, operates at minus 268 degrees Celsius and magnifies atoms -- placed on a copper surface --  by 100 million times. The machine moved around 5,000 carbon monoxide molecules to create the movie. Each time the molecules were arranged in the right way, the IBM team rendered a still image to create each of the 242 frames. In those frames, you can only see one atom or pixel because you look at it from above. It took roughly 10 days of 18-hour shifts to get each frame right.

more...
No comment yet.
Scooped by Hans De Keulenaer
Scoop.it!

Bonding tungsten, W–Cu-alloy and copper with amorphous Fe–W alloy transition

Bonding tungsten, W–Cu-alloy and copper with amorphous Fe–W alloy transition | The Copper Universe | Scoop.it

W/Cu graded materials are the leading candidate materials used as the plasma facing components in a fusion reactor. However, tungsten and copper can hardly be jointed together due to their great differences in physical properties such as coefficient of thermal expansion and melting point, and the lack of solid solubility between them. To overcome those difficulties, a new amorphous Fe–W alloy transitional coating and vacuum hot pressing (VHP) method were proposed and introduced in this paper. The morphology, composition and structure of the amorphous Fe–W alloy coating and the sintering interface of the specimens were analyzed by scanning electron microscopy (SEM), energy dispersive spectrometer (EDS) and X-ray diffraction (XRD). The thermal shock resistance of the bonded composite was also tested. The results demonstrated that amorphous structure underwent change from amorphous to nano grains during joining process, and the joined W/Cu composite can endued plasma thermal shock resistance with energy density more than 5.33 MW/m2. It provides a new feasible technical to join refractory tungsten to immiscible copper with amorphous Fe–W alloy coating.

more...
No comment yet.
Scooped by Hans De Keulenaer
Scoop.it!

Copper Rotor Motor Featured in Energy Efficient Emerging Technologies Website

Copper Rotor Motor Featured in Energy Efficient Emerging Technologies Website | The Copper Universe | Scoop.it
Washington State University's Extension Energy Program features the benefits of the copper rotor motor.
more...
No comment yet.
Scooped by Hans De Keulenaer
Scoop.it!

New CPU Coolers Win 2013 CES Innovation Awards

New CPU Coolers Win 2013 CES Innovation Awards | The Copper Universe | Scoop.it

According to the company, the new FX100 Cube fanless cooler is compatible with a large majority of CPU sockets and features copper and aluminum heat pipes for natural heat dissipation. Users also have the option of installing a 92mm fan for additional cooling performance.


more...
No comment yet.
Scooped by Hans De Keulenaer
Scoop.it!

Blackening copper opens new applications

Blackening copper opens new applications | The Copper Universe | Scoop.it
(Phys.org)—Copper is one of the world's most widely used metals. Now researchers at the University of Dundee have found that blackening copper using industry-standard lasers could make it even more adaptable and ...
more...
No comment yet.
Scooped by Hans De Keulenaer
Scoop.it!

Govt to establish Copper park | Times of Zambia

Govt to establish Copper park | Times of Zambia | The Copper Universe | Scoop.it
THE GOVERNMENT is to establish an industrial Copper Park in Central Province that will make it possible for manufacturing companies to access raw material for the purpose of value addition. Commerce, Trade and Industry ...
Hans De Keulenaer's insight:

As the bulk of value-added in copper production is in mining, does it make sense for countries rich in copper resources to try to climb the value-added ladder?

more...
No comment yet.
Scooped by Hans De Keulenaer
Scoop.it!

Compliance issues for copper clad aluminium cable

Compliance issues for copper clad aluminium cable | The Copper Universe | Scoop.it
The ACMA recently worked with Cabling Connection magazine to get the word out about a non-compliant type of cable – copper clad aluminium cable (CCA).

CCA cable cannot comply with the mandated Australian telecommunications cabling products standards and cannot be used as telecommunications customer cabling in Australia.
more...
No comment yet.
Scooped by Hans De Keulenaer
Scoop.it!

Neutron transmutation doping as an experimental probe for CuZn in ZnSe | Browse Journal - Journal of Applied Physics

Nuclear transmutation is employed in an investigation of copper doping in ZnSe. Copper atoms are introduced at zinc sites in ZnSe after crystal growth processes are complete. Since the copper dopants are introduced after growth, far from equilibrium, they are less able to form complexes with other dopants or lattice defects as they may do when present during crystal growth. Initial results are consistent with CuZn being involved in the copper red and copper green emissions in ZnSe but not in the I1d exitonic emission. © 1997 American Institute of Physics.
more...
No comment yet.
Scooped by Hans De Keulenaer
Scoop.it!

Copper-Doped Bismuth Selenide Could Be The Silcon Of Quantum Computers

Physicists have found elusive Dirac electrons in a superconducting material called copper-doped bismuth selenide - and say it could serve as the silicon of the quantum era.
more...
No comment yet.
Scooped by Hans De Keulenaer
Scoop.it!

Polymer chemistry: A pinch of copper proves invaluable

Polymer chemistry: A pinch of copper proves invaluable | The Copper Universe | Scoop.it
The key is using a catalyst that can readily switch between two oxidation states, such as a copper salt, explains Parthiban. The copper catalyst first interacts with an ATRP initiator molecule to activate organic free radicals and an oxidized metal complex. The free radicals then quickly polymerize target monomers, while the metal complex undergoes equilibrium with a dormant, lower oxidation state. With appropriate reaction conditions, chemists can then restart polymerization with new monomers.
more...
No comment yet.
Scooped by Hans De Keulenaer
Scoop.it!

He Found Comfort in Copper

He Found Comfort in Copper | The Copper Universe | Scoop.it
After his wife’s death, three years ago, Kreutzer was left very lonely and disconsolate. When he complained to his daughter, a schoolteacher, who had been in China until recently, she suggested that he take up a hobby, especially since her father had always shown an artistic talent. But Kreutzer, now living in a tiny room, just couldn’t see himself working on a hobby, until his daughter one day brought him a roll of sheet copper and some tools. Suddenly, he became curious and wondered what could be created out of this inexpensive material.
more...
No comment yet.
Scooped by Hans De Keulenaer
Scoop.it!

The U.S. Once Tried to Wrap a Ring of Copper Wire Around the Earth

The U.S. Once Tried to Wrap a Ring of Copper Wire Around the Earth | The Copper Universe | Scoop.it

In the early 1960s, a little less than a decade before the mission to the moon, the U.S. looked to space when planning an emergency communications system. At the time, the undersea telephone and telegraph cables were backed up only over-the-horizon radio, and both systems were vulnerable to attack or natural disaster. Today, Wired takes a look at a team of a team of MIT scientists who dreamed up a pretty far fetched but, they estimated, entirely feasible solution: Wrap thousands of miles of copper cable around the Earth to serve as a giant antenna. They called it Project West Ford.

more...
No comment yet.
Scooped by Hans De Keulenaer
Scoop.it!

The Old Copper Smelting Plants

The Old Copper Smelting Plants | The Copper Universe | Scoop.it

“Karabashmed” is one of the oldest copper smelting plants of the South Ural located in the city of Karabash. The main activity of the plant is making blister copper from copper concentrate with a preliminary enrichment of copper-zinc ores and also from recycled copper raw material.

more...
Duane Tilden's curator insight, May 4, 2013 10:38 PM

Amazing photo journal of an Industrial Copper Refinery, including rare photo's of old technological processes.

Scooped by Hans De Keulenaer
Scoop.it!

Light may recast copper as chemical industry "holy grail"

Light may recast copper as chemical industry "holy grail" | The Copper Universe | Scoop.it

Wouldn't it be convenient if you could reverse the rusting of your car by shining a bright light on it? It turns out that this concept works for undoing oxidation on copper nanoparticles, and it could lead to an environmentally friendly production process for an important industrial chemical, University of Michigan engineers have discovered.

more...
No comment yet.
Scooped by Hans De Keulenaer
Scoop.it!

Copper theft falls to lowest level since 2009

Copper theft in South Africa fell to its lowest level since April 2009 in January, indicating that the downward momentum seen in 2012 should continue into 2013, the South African Chamber of Commerce and Industry (Sacci) ...
Hans De Keulenaer's insight:

Apparently, the policies pursued in South Africa are effective.

more...
No comment yet.
Scooped by Hans De Keulenaer
Scoop.it!

Sintering of Ternary Copper Alloys (Powder Metalurgy) – Electrical and Mechanical Properties Effects

Sintering of Ternary Copper Alloys (Powder Metalurgy) – Electrical and Mechanical Properties Effects | The Copper Universe | Scoop.it

The practical powder metallurgy processing steps on the copper-nickel-base alloys corroborate a first-rate mechanical strength and electrical conductivity values (Cu-Ni-Sn: 620Mpa, 40% IACS; Cu-Ni-Al: 400MPa, 35% IACS; Cu-Ni-Cr: 1000MPa; 79% IACS) that indicate a good quality application for these alloys utilizing powder metallurgy instead conventional metallurgy processing. Furthermore, the results for these alloys open the possibility to search and make fine grained homogeneous structures with interesting physical properties, also the capacity to produce parts with a superior surface finishing in different dimensions.

more...
No comment yet.
Scooped by Hans De Keulenaer
Scoop.it!

Electrochemical Reduction of CO2 to CH3OH at Copper Oxide Surfaces

Hans De Keulenaer's insight:

The direct reduction of CO2 to CH3OH is known to occur at several types of electrocatalysts including oxidized Cu electrodes. In this work, we examine the yield behavior of an electrodeposited cuprous oxide thin film and explore relationships between surface chemistry and reaction behavior relative to air-oxidized and anodized Cu electrodes. CH3OH yields (43 μmol cm−2 h−1) and Faradaic efficiencies (38%) observed at cuprous oxide electrodes were remarkably higher than air-oxidized or anodized Cu electrodes suggesting Cu(I) species may play a critical role in selectivity to CH3OH. Experimental results also show CH3OH yields are dynamic and the copper oxides are reduced to metallic Cu in a simultaneous process. Yield behavior is discussed in comparison with photoelectrochemical and hydrogenation reactions where the improved stability of Cu(I) species may allow continuous CH3OH generation.

more...
No comment yet.
Scooped by Hans De Keulenaer
Scoop.it!

Penny Wise: 12 Cool Copper-Clad Buildings (Page 1) | WebUrbanist

Penny Wise: 12 Cool Copper-Clad Buildings (Page 1) | WebUrbanist | The Copper Universe | Scoop.it
Urban designers far and wide have warmed to copper's practical beauty, employing it to clad buildings of all sizes and why not: it makes perfect cents.
more...
No comment yet.
Scooped by Hans De Keulenaer
Scoop.it!

Thermacore DARPA MACE Contract with U.S. Department of Defense Leads to Breakthrough Thermal Technol

Thermacore DARPA MACE Contract with U.S. Department of Defense Leads to Breakthrough Thermal Technol | The Copper Universe | Scoop.it
The MACE-developed heat sinks will be available for insertion into four chassis cooling formats, 3U through 6U, and will feature excellent thermal uniformity and low thermal resistance. These compact, high-performance air-cooled heat sink products will handle heat loads from 250 Watts to 2,000 Watts depending on model. Although the design and layout of the heat sinks is novel, their construction involves standard materials such as copper (wall and wick) and aluminum (fins); the working fluid can be water or methanol. Mounting features are customizable for each application.
more...
No comment yet.
Rescooped by Hans De Keulenaer from Sustain Our Earth
Scoop.it!

Copper restricts the spread of global antibiotic-resistant infections

Copper restricts the spread of global antibiotic-resistant infections | The Copper Universe | Scoop.it
Southampton, UK (SPX) Dec 11, 2012 - New research from the University of Southampton has shown that copper can prevent horizontal transmission of genes, which has contributed to the increasing number of antibiotic-resistant infections...

Via SustainOurEarth
more...
No comment yet.
Scooped by Hans De Keulenaer
Scoop.it!

Copper, gold and tin for efficient chips

Copper, gold and tin for efficient chips | The Copper Universe | Scoop.it
The requirements relating to the drivers are enormous: they must be immune to the high temperature and voltage differences in a car or be resistant to aggressive chemicals. In order to guarantee reliable luminosity, a higher voltage must flow through the circuits of the LED drivers. Researchers from the Fraunhofer Institute for Microelectronic Circuits and Systems IMS offer manufacturers a process to manufacture the chips that suit these applications: it is based on galvanization, a process in the semiconductor industry, in which special metals are deposited on the semiconductors.
more...
No comment yet.
Scooped by Hans De Keulenaer
Scoop.it!

Une solution rend possible la traçabilité des câbles en cuivre volés

Une solution rend possible la traçabilité des câbles en cuivre volés | The Copper Universe | Scoop.it

La SNCF a attribué au français Nexans, spécialiste industriel du câble, un premier contrat portant sur la conception et la fabrication d'un câble ferroviaire spécial qui incorpore une nouvelle technologie de câble antivol.

more...
No comment yet.
Scooped by Hans De Keulenaer
Scoop.it!

New strategies aim to thwart copper thieves

Utilities are trying a variety of strategies, spokesman Steve Berry said in an email, including:

• Working with scrap metal dealers to help them become familiar with Utilities’ wire and associated markings
• Safeguarding streetlights with tamper-proof screws and doors that are more difficult to break
• Installing cameras and alarms at Utilities materials yards
• Making it more difficult for thieves to pull large amounts of wire from a streetlight or other Utilities-related equipment
more...
No comment yet.