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au TELECONFERENCE COURSE
ON-SITE GROUP TRAINING FOR LESS THAN THE COST OF SENDING TWO CHEMISTS TO AN OUT-OF-TOWN SEMINAR! No longer do you have to make those tough decisions about who on the staff can go to the next seminar! With ACS Teleconference Courses, you can upgrade the knowledge and productivity of your technical staff — train as many people as you like at any location you choose. When you enroll your group in these courses, you need go no farther than the nearest conference room to attend.
HOW YOU AND YOUR ORGANIZATION BENEFIT • Training by recognized leaders in research and management • Convenient continuing education — at your own site, as close as your nearest telephone • Effective use of your staff training time — no valuable time lost for travel • Your choice of afteroon or evening sessions • Low per person costs (For a group of 20, for example, per person fees are only about $40.)
CHOOSE FROM THESE TOP-RATED COURSES Offered March/April 1983 Advances in the Physical Chemistry of Polymers by Dr. James E. Mark, Dr. Adi Eisenberg, Dr. Leo Mandelkern and Dr. Richard S. Stein Basic HPLC by Dr. Harold M. McNair Chemical Engineering For Chemists by Dr. Richard G. Griskey The Effective Manager by James H. Morrison Introduction To Gas Chromatography by Dr. Harold M. McNair
HOW ACS TELECONFERENCING WORKS The experts are brought to you live via telephone conference call. As an integral part of the courses, you and your staff participate in open-mike discussions with other sites in the US and Canada. Added features are the specially prepared handouts and slides that your group receives. Each course is conducted in several 1-to-1 -1/2-hour sessions, permitting you time between classes to digest material or even to conduct local discussion groups.
FOR MORE INFORMATION Call Ms. Cyrelle Gerson today at (202) 872-8728 to request a descriptive brochure, or mail the coupon below:
YES Please send me detailed information on ACS Teleconference Courses. Name . Title
Telephone (
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Mail to; ACS Teleconference Courses, Department of Educational Materials, 1155 Sixteenth Street, NW, Room 809, Washington, DC 20036
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January 17, 1983 C&EN
Technology
Fluorine method bonds diamonds to metal A new way to bond diamonds to metal has been developed at Los Alamos National Laboratory. The process can produce extremely hard grinding wheels for machining operations and has potential for other applications, such as jewelry. Developed by physical chemist Gene W. Taylor, assistant leader of Los Alamos' explosives technology group, the process involves treating the diamonds so that they adhere to the bonding material, Teflon fluorocarbon resin. It's an "amazing irony," says Taylor, since the two substances have been considered unable to adhere chemically to each other. Taylor and Los Alamos technician Herman Roybal use both chemical and physical bonding to attach industrial diamonds to aluminum grinding wheels. They begin with a process that generates fluorine atoms, which react with the surfaces of the diamonds. With fluorinated surfaces, the diamonds can then be further chemically bonded to fluorocarbon resin, producing a very tough material. After this material dries, it will chemically bond to the aluminum grinding wheel. The diamond-fluorocarbon material is then physically compressed and ground deep into the aluminum with a hot press used to make commercial machining wheels. The grinding wheels made by the new process have proved extremely successful and long wearing, Taylor says. They are also less expensive to produce than are traditional epoxyglued diamond-encrusted wheels or wheels covered with diamonds ground into overlapping thin layers of metal. Los Alamos machinists successfully have adopted the grinding wheels made by the new method. They had found commercially available wheels inadequate for grinding new types of hard ceramics and metals developed at the lab. Taylor also notes that Teflon could be used to hold diamonds in metal settings without fasteners. This would allow more versatility in jewelry design and fabrication. D
