By O. Johari (auth.), Joel S. Hirschhorn, Kempton H. Roll (eds.)
The expanding use of powder metallurgy innovations to make a virtually endless number of fabrics and items locations higher emphasis on usage of subtle experimental strategies. often examine and improvement efforts begin using newly constructed gear and analytical systems. certainly, the contents of this ebook are strongly associated with learn endeavors, in either the tutorial and industrials worlds. even though, this quantity can serve a far wanted functionality in commercial utilized powder metallurgy. even if many study ers will locate the contents of serious price, the technical team of workers extra concerned with creation, quality controls, purchaser companies and product layout now have at their dispo sal a method to profit in regards to the power makes use of of a number of extremely important recommendations. With contemporary "knowledge explosion" the current set of papers significantly allows the comprehension and adoption of recent techniques. If powder metallurgy is to proceed its fast cost of progress in nearly all segments of undefined, then the transition of contemporary apparatus and systems from instruments of analysis and improvement laboratories to daily plant operations and purposes needs to be hastened. The editors wish that this quantity aids during this method, in addition to aiding scholars and researchers by way of supplying a prepared resource of up to date invaluable information.
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Additional info for Advanced Experimental Techniques in Powder Metallurgy: Based on a Symposium on Advanced Experimental Techniques in Powder Metallurgy sponsored by the Institute of Metals Division, Powder Metallurgy Committee, held at the Spring Meeting of The Metallurgica
0 loge (Time J Figure 3 Neck Growth Data for Ag at 700°C. M. KAUFMAN, T. J. WHALEN, AND L. R. 1~ would be l0-3 seconds if surface diffusion was responsible for neck growth and 2 seconds if volume diffision predominated. It is unlikely that times required for similar changes in silver or copper are very much different and, indeed, this was shown to be the situation when the scaling laws were applied to the copper and silver data obtained here. 86 microns. 5, an average of reported values from other investigations.
01. 01 indicates that whichever of the two mechanisms is operative can be unambiguously identified by comparison of data for particles about lOO~m diameter to particles about l~m in diameter. 4 for the lOO~m particles. 01. If volume diffusion controls the neck growth in this size range then 6-t. 6 to 36 seconds. Similarly, the calculation for surface " Kuczynski's(l) data show similar geometric changes for silver particles and do not differ appreciably in time interval. M. KAUFMAN, T. J. WHALEN, AND l.
Am. Cer. , 51, 669 (1968). 2. B. E. Gere, L. Erdey, and M. Devenyi, Bany. Koh. Lapok (Kohaszat), 101, 319 (1968). 3. G. H. Gessinger, F. V. Lenel, and G. S. Ansell, Trans. Am. Soc. , 61, 598 (1968). 4. G. C. Kuczynski, Trans. Am. Inst. Min. Metall. , 185, 169 (1949). 5. D. W. Pashley, M. J. Stowell, M. H. Jacobs, and T. J. Law, Phil. , 10, 127 (1964). 6. W. W. Mullins, J. , 28, 333 (1957). 7. L. R. Sefton and s. M. Kaufman, Proceedings of Election Microscopy Soc. , 26th Annual Meeting, 432 (1968).
Advanced Experimental Techniques in Powder Metallurgy: Based on a Symposium on Advanced Experimental Techniques in Powder Metallurgy sponsored by the Institute of Metals Division, Powder Metallurgy Committee, held at the Spring Meeting of The Metallurgica by O. Johari (auth.), Joel S. Hirschhorn, Kempton H. Roll (eds.)