1. Department of Metallurgical Engineering, University of Utah, 135 S 1460 E, Room 412, Salt Lake City, Utah 84112-0114, Department of Materials Science and Engineering, Michigan Technological University, M&M Bldg 506, Houghton, Michigan 49931, and Department of Chemical Technology, Gdansk University of Technology, Narutowicza 11/12, 80-952 Gdansk, Poland