Materials Science and Engineering Handbook Part 12

Tham khảo tài liệu 'materials science and engineering handbook part 12', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Table 353. Selecting Diffusion Activation Energy in Metallic Systems Sheet 14 OF 33 Metal Tracer Crystal Form Purity Temperature Range C Activation Energy Q kcal moL1 Frequency Factor Do crrr s 1 b-Praseodymium Pr142 p 800-900 Zinc Cu64 S c 338-415 P-Titanium Ni63 p 925-1600 X 10 3 Aluminum Cd115 s 441-631 Zinc Au198 s c 315-415 Zinc Au198 S c 315-415 Calcium c14 550-800 X 10 5 Selenium S35 s c 60-90 1700 b-Zirconium Zr95 p 1100-1500 X IQ-4 y-Uranium Au195 p 785-1007 X 10 3 P-Zirconium g235 p 900-1065 X 101 P-Titanium Co60 p 900-1600 X 10 2 Source data from Askill J. in Handbook of Chemistry and Physics 55Weast . Ed. CRC Press Cleveland 1974 F61. 2001 CRC Press LLC Table 353. Selecting Diffusion Activation Energy in Metallic Systems Sheet 15 OF 33 Metal Tracer Crystal Form Purity Temperature Range C Activation Energy Q kcal moL4 Frequency Factor Do crrr s 1 b-Zirconium Be7 p 915-1300 X 10 2 P-Titanium Ti44 p 900-1540 X 101 a-Zirconium Nb95 p 740-857 X 10 9 P-Titanium Fe59 p 900-1600 X 10 3 b-Titanium Sn113 p 950-1600 X 104 Niobium c14 p 800-1250 X IQ-5 Magnesium Mg28 S c 467-635 P-Titanium V48 p 900-1545 X 101 Aluminum Cu64 s 433-652 P-Titanium Sc46 p 940-1590 X 10 3 Magnesium Mg28 s c 467-635 P-Zirconium p32 p 950-1200 Source data from Askill J. in Handbook of Chemistry and Physics 55Weast . Ed. CRC Press Cleveland 1974 F61. 2001 CRC Press .