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Mechanical Alloying ; c 8 ý” X ¢ R X N Ëù m Ç Ti

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fHÄ»o„s“:r•¸ (T^g) +þA$íH†d`¦ ^¦Ãº e”%3“¦, Õª °úכ“Ér€• 391.9^◦Cs%3. ¢¸ôÇ Kissinger ~½ÓZOܼ

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PACS numbers: 81.20.E

Keywords:l>&h“ ½+ËFKo, Ti-Cu-Ni-Co,Ö¸$ío\-t

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:r 7HëH“Ér ^¦õ †<Êa r„ H 6 xl?/\"f Ti40Cu40Ni10Co10 +þAd”_ ›¸$íܼ–Ð q&ñ|9 ½+ËFK`¦ ]

jŒ• #Œ, tm\ Ér q&ñ|9o õ&ñ`¦ X-‚ r]X ©œu

∗E-mail: hgakim@chosun.ac.kr

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Ti40Cu40Ni10Co10_ MAH Aldrich Chemical_ Ti, Cu, Niõ Co ìr´ú˜ (íH•¸ ≥ 99.9 %)`¦6 x #Œ "é¶(G'p à

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Fig. 1. X-ray patterns of Ti₄₀Cu₄₀Ni₁₀Co₁₀ powder as a function of milling time.

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Fig. 1“Ér Ti40Cu40Ni10Co10ìr´ú˜_ t^m\ Ér X-‚ r ]X

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·p ÕªaË>s. x9aA õ

&ñ“Ér 3rçߖt x9aAÙþ¡`¦âĺ ¨îçH€• 203 µm_ é#Q o

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ߖ Êê\H&h  W÷&#Q 20rçߖ x9aAÙþ¡`¦âĺ\H€• 22 µm &ñ•¸_ ß¼lt ©œ{©œy çH{9 > W÷&%36£§`¦

Fig. 2. SEM micrographs for Ti40Cu40Ni10Co10powder with milling time: (a) 1 h, (b) 3 h, (c) 5 h, (d) 10 h, (e) 20 h, and (f) 40 h.

Fig. 3. The grain size of Ti40Cu40Ni10Co10 powder by MA as a function of the milling time.

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-tH -9.5 mJ/mgs%3.

Fig. 4. The variation of DSC curves with milling time for Ti40Cu40Ni10Co10 powder.

Fig. 5. The variation of DSC curves with heating rate of Ti40Cu40Ni10Co10 powder for milling of 40 hours.

Fig. 5H\P%ƒo t ·ú§“Érq&ñ|9 FK5Åq½+ËFK`¦ 40rçߖ x9

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Fig. 6. Kissinger plots of ln(Q/T²_p) vs. 1/Tp of Ti₄₀Cu₄₀Ni₁₀Co₁₀powder.

Fig. 7. Composition (at.%) of Ti40Cu40Ni10Co10powder as a function of milling time.

#Œ Kissinger ~½ÓZO [9]`¦s6 x %i.

d[ln(Q/T_p²)]/d(1/Tp) = −E/R

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