No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.
Sintered powder cores of high B s
and low coreloss Fe84.3
3. A. Makino, T. Hatanai, A. Inoue, and T. Masumoto, Mater. Sci. Eng. A 226–228, 594 (1997).
11. A. R. Yavari, G. Fish, S. K. Das, and L. A. Davis, Mater. Sci. Eng. A181/A182, 1415 (1994)
12. M. A. Willard, D. E. Laughlin, M. E. MacHenry, D. Thoma, K. Sickafus, J. O. Cross, and V. G. Harris, J. Appl. Phys. 84, 6773 (1998).
13. A. Makino, A. Inoue, and T. Masumoto, Mater. Trans., JIM 36, 924 (1995).
19. B. D. Cullity, Elements of X-ray diffraction, 102 (1978).
21. P. Gramatyka, R. Nowosielski, P. Sakiewicz, and T. Raszka, J. Achievements in Materials and Manufacturing Engineering 15, 27 (2006).
30. M. M. Raja, N. Ponpandian, B. Majumdar, A. Narayanasamy, and K. Chattopadhyay, Mater. Sci. Eng. A 304–306, 1062 (2001).
35. L. Hultman and O. Andersson, “Advances in SMC technology-Materials and Applications” presented at EURO PM 2009 in Copenhagen, Denmark on October 13, 2009.
37. T. Maeda, H. Toyoda, N. Igarashi, K. Hirose, K. Mimura, T. Nishioka, and A. Ikegaya, SEI Technical Review 60, 3 (2005).
Article metrics loading...
Nano-crystalline Fe-rich Fe84.3Si4B8P3 Cu 0.7 alloy ribbon with saturation magnetic flux density (B s ) close to Si-steel exhibits much lower core loss (W t ) than Si-Steels. Low glass forming ability of this alloy limits fabrication of magnetic cores only to stack/wound types. Here, we report on fabrication, structural, thermal and magnetic properties of bulk Fe84.3Si4B8P3 Cu 0.7 cores. Partially crystallized ribbons (obtained after salt-bath annealing treatment) were crushed into powdered form (by ball milling), and were compacted to high-density (∼88%) bulk cores by spark plasma sintering (SPS). Nano-crystalline structure (consisting of α-Fe grain in remaining amorphous matrix) similar to wound ribbon cores is preserved in the compacted cores. At 50 Hz, cores sintered at T s = 680 K show W t < 10 W/kg (f = 50 Hz, B m ∼1 T). Coating/mixing of powders with an insulating agent like SiO2 is shown to be effective in further reduction of W t at f > 1 kHz. A trade-off between porosity and electrical resistivity is necessary to get low W t at higher f. In the f range of ∼1 to 100 kHz, we have shown that the cores mixed with SiO2 exhibit much lower W t than Fe-powder cores, non-oriented Si-steel sheets and commercially available sintered cores. We believe our core material is very promising to make power electronics/electrical devices much more energy-efficient.
Full text loading...
Most read this month