Archive for July, 2007
Saturday, July 21st, 2007
Jitterbugging flecks of metal are challenging some prevailing ideas of how alloys form.
When deposited atop a pure copper crystal, tin atoms form into 100,000-atom rafts that scoot around madly, depositing bronze spots in their wake, physicists at Sandia National Laboratories in Livermore, Calif., have found.
So much for the long-held notion ...
Posted in Tin Alloys | No Comments »
Saturday, July 21st, 2007
Solder joints were prepared from seven eutectic and near-eutectic Sn-based compositions and characterized for electrical resistivity after 100 h and 1,000 h of isothermal aging at 423 K. The solder joint samples were prepared by hand soldering to copper substrates, and the post-heat treatment resistivity was measured at room temperature ...
Posted in Tin Alloys | No Comments »
Saturday, July 21st, 2007
The wetting of I-Ag (immersion silver) and I-Sn (immersion tin) printed-circuit-board (PCB) finishes by Sn/Ag/Cu and eutectic Sn/Pb solders was studied in this work with Ni/Au (electroless nickel/immersion gold) and organic solderability preservative (OSP) finishes as baselines. Wetting tests were performed on fresh boards and boards subjected to different preconditioning ...
Posted in Tin Alloys | No Comments »
Saturday, July 21st, 2007
The microstructures from the reaction between Au and Sn under different conditions were studied. A Sn/Au/Ni sandwich structure (2.5/3.752 µm) was deposited over the Si wafer. The overall composition of the Au and Sn layers corresponded to the Au20Sn binary eutectic (wt.%). When the reaction condition was 290°C for 2 ...
Posted in Tin Alloys | No Comments »
Saturday, July 21st, 2007
Metallurgical changes that have improved superalloys and titanium alloys--making the metal stronger, tougher and/or more resistant to oxidation or corrosion--have also made these metals more difficult to machine.
For the nickel-, iron- and cobalt-based superalloys, high temperature characteristics translate directly to machining challenges. The combination of high cutting force and high ...
Posted in Tin Alloys | No Comments »
Friday, July 20th, 2007
The commercial airline sector has been in financial turmoil in the past year, and the reduction in new aircraft manufacturing has negatively affected the consumption of specialty and high-temp alloys, such as titanium, chromium and nickel.
According to a report in the December 13 edition of Manufacturing News, civil aviation sales ...
Posted in High Temp Metals | No Comments »
Friday, July 20th, 2007
When local leaders learned Canon USA was eyeing the Garden State, the Suffolk Industrial Development Agency offered up to $35 million in tax breaks to keep Canon here. Now, Babylon's IDA is working overtime to lure Hi-Temp Specialty Metals Inc.'s headquarters from Willingboro, N.J., to Deer Park.
The economic development group ...
Posted in High Temp Metals | No Comments »
Friday, July 20th, 2007
The aerospace industry is the bull in the high-temp and titanium alloy markets. If aerospace is asleep, any bull market in specialty metals is dead to the world, too. But put a bit of spark into aircraft, and the bull starts shaking in the specialty metals market.
Like Sleeping Beauty, the ...
Posted in High Temp Metals | No Comments »
Friday, July 20th, 2007
CHICAGO - Prices for high-temperature alloy scrap remained firm in a pair of recent sales by the Defense Reutilization and Marketing Service. Some scrap industry sources attributed this to the recent upsurge in world prices for cobalt metal, especially for superalloys with both nickel and cobalt.
Even small lots of cobalt ...
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Friday, July 20th, 2007
Special Metals hikes high-temp alloys
PITTSBURGH--Special Metals Corp. late last week said that it was hiking the price of its high-temperature alloy products by about 4.5 percent across the board effective with orders Friday.
The New Hartford, N.Y.,-based producer of high-temperature long products attributed the increase to rising raw materials costs, including ...
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