㋕㍑䈫ṁⲢ੝㋦㑆䈱෻ᔕ᜛ᢔ䈮㑐䈜䉎ၮ␆⎇ⓥ㩷 㩷㩷⎇ⓥઍ⴫⠪㩷 ᧲ർᄢቇᄙర‛⾰⑼ቇ⎇ⓥᚲ㩷 ᢎ᝼㩷 ⽴ᴧ੫੺㩷㩷㪈㪅 ✜⸒㩷㩷 ㍑䈱⠴㘩ᕈ䉕ะ਄䈘䈞䉎ᛛⴚ䈫䈚䈩ṁⲢ੝㋦䉄䈦䈐䋨㪞㪠䋩䉇ว㊄ൻṁⲢ੝㋦䉄䈦䈐䋨㪞㪘䋩䈏ᐢ䈒᥉෸䈚䈩䈇䉎 㪈㪀䇯⥄േゞ㍑᧼↪䈱ṁⲢ੝㋦䉄䈦䈐䈪䈲䇮৻⥸䈮 㪇㪅㪈䌾㪇㪅㪉㫎㫋㩼⒟ᐲ䈱 㪘㫃 䉕฽᦭䈘䈞䈢㪱㫅㪄㪘㫃 ᶎ䈏೑↪䈘䉏䈩䈇䉎䇯䈖䉏䈲䇮㪘㫃 䉕ᷝട䈚䈢႐ว䈮䈲䇮㍑䈫ᶎ䈱⇇㕙䈮 㪝㪼㪄㪘㫃 ㊄ዻ㑆ൻว‛䈏䊐䉞䊦䊛⁁䈮ᒻᚑ䈘䉏䇮㪱㫅㪄㪝㪼 ൻว‛䈱ᒻᚑ䉕ᛥ೙䈜䉎䈖䈫䈪䇮ᦨ⚳⊛䈮ဋ⾰䈭⚵❱䉕ᜬ䈧䉮䊷䊁䉞䊮䉫ጀ䈏ᓧ䉌䉏䉎䈢䉄䈪䈅䉎 㪈㪀㩷 䇯㪞㪠 䉇 㪞㪘 ㍑᧼䈮䈍䈔䉎 㪝㪼㪄㪘㫃 ൻว‛ጀ䈱ᒻᚑ䈫⎕უ䈲䇮ታ↪
⊛䈮㕖Ᏹ䈮㊀ⷐ䈪䈅䉍䇮㍑䈮ᷝട䈘䉏䉎ว㊄ర⚛䈱⒳㘃䉇⚵ᚑ䈮䉋䉍䈠䈱᜼േ䈏ᄢ䈐䈒ᓇ㗀䉕ฃ䈔䉎੐䈏⍮䉌䉏䈩䈇䉎䉅䈱䈱䇮ၮ␆⎇ⓥ䈲චಽ䈮ㅴ䉖䈪䈇䈭䈇 㪉㪄㪋㪀䇯㩷㪝㫀㪾㪅㪈 䈲䇮ᦨㄭ䉁䈫䉄䉌䉏䈢 㪝㪼㪄㪱㫅䋲ర♽⁁ᘒ࿑ 㪌㪀䈪䈅䉎䇯䈖䈖䈮␜䈜䉋䈉䈮 㪝㪼㪄㪱㫅 ♽䈮䈲 㪱㫅 ஥䈮㰰㪄㪝㪼㪊㪱㫅㪈㪇䇮㰰㪈㪄㪝㪼㪈㪈㪱㫅㪊㪐䇮㱐㪄㪝㪼㪱㫅㪎㪄㪈㪇䇮㱒㪄㪝㪼㪱㫅㪈㪊 ╬䇮ᢙᄙ䈒䈱㊄ዻ㑆ൻว‛䈏ႎ๔䈘䉏䈩䈇䉎䇯䉁䈢䇮㪝㫀㪾㪅䋲䈲䇮㪧㪼㫉㫉㫆㫋 䉌 㪍㪀䈮䉋䉍ႎ๔䈘䉏䈢䉅䈱䉕ၮᧄ䈮ᦨㄭ䈱ᚒ䇱䈱ᖱႎ 㪎㪃㪏㪀䉕ട䈋䈩ୃᱜ䈚䈢 㪋㪌㪇㷄䈱 㪱㫅 ஥ 㪱㫅㪄㪝㪼㪄㪘㫃䋳ర⁁ᘒ࿑ 㪐㪀䉕␜䈚䈩䈇䉎䇯ᶧ⋧䇮㱐⋧䇮㱒⋧㑆䈱ᐔⴧ䈮䈍䈇䈩䈲䇮㪝㪼 ᐔⴧ⚵ᚑ䈲 㪘㫃 䈱ᷝട䈮䉋䈦䈩䉅䈅䉁䉍ᄢ䈐䈭ᓇ㗀䉕ฃ䈔䈭䈇䈏䇮㪘㫃 䈲㱐⋧㪕㱒⋧㪕ᶧ⋧䈱㗅䈮ᒝ䈒ಽ㈩䈚䇮㱒⋧䈻䈱 㪘㫃 䈱࿕ṁ㒢䈲⚂ 㪇㪅㪏㫎㫋㩼⒟ᐲ䈪䈅䉎䇯䉁䈢䇮ᦨㄭ䈱ႎ๔ 㪈㪇㪀䈮䉋䉏䈳䇮ᶧ⋧ਛ䈱 㪝㪼 䈱ṁ⸃ᐲ䈲 㪘㫃 䈱ᷝട䈮䉋䉍ᓢ䇱䈮ૐਅ䈚䇮㪇㪅㪉㫎㫋㩼㪘㫃 䈪䈲 㪇㪅㪇㪈㫎㫋㩼એਅ䈮䈭䉎䇯㩷㩷
㩷
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5)

㩷 (KIFe-Zn binary phase diagram 㩷(KIZn-Fe-Al ternary phase diagram of theZn-rich portion evaluated from recent works 9).

㩷ᦨㄭ‫ޔ‬ᚒ‫⭯ߪޘ‬㋕ࠍ 450͠ߦ଻ᜬߒߚ Zn ᶎਛߦᚲቯᤨ㑆ᶐẃߒߚᓟ‫ޔ‬὾౉ࠇߦࠃࠅߘߩ⁁ᘒࠍಓ⚿ߔࠆታ㛎ᚻᴺࠍ↪޿ߡ‫⚐ޔ‬㋕ߣ⚐ Zn ᶎ⇇㕙ߦᒻᚑߐࠇࠆ⚵❱ߣ⇇㕙ㄭறߩ Fe Ớᐲࡊࡠࡈࠔࠗ࡞ࠍ⺞ᩏߒߚ 7,11)‫⚿ߩߘ ޕ‬ᨐ‫ޔ‬ᶐẃ⋥ᓟ߆ࠄ಴⃻ߔࠆ Zn-Fe ൻว‛ጀߩᚑ㐳ߪ‫ޔ‬ᶐẃᤨ㑆ߩᐔᣇᩮߦᲧ଀ߔࠆ޿ࠊࠁࠆ࡞࡯࠻ೣߦᓥ߁߇‫ޔ‬ᶐẃೋᦼߦ߅޿ߡߪ․ߦǬ/Ǯ⇇㕙㧙㧙ߣ L(ᶧ⋧)/Ǯ⇇㕙ߩ⚵ᚑ߇ᐔⴧ⁁ᘒ࿑߆ࠄᄢ߈ߊ஍୦ߔࠆߎߣ߇᣿ࠄ߆ߦߥߞߚ‫ޔߦ․ޕ‬L/Ǯ⇇㕙߆ࠄᶧ⋧ਛߦṁߌ಴ߔ Fe Ớᐲߪ‫ޔ‬ᶐẃ㐿ᆎ⋥ᓟߦ߅޿ߡߪᐔⴧ⁁ᘒࠃࠅ⚂㧞ᩴ߽㜞޿
⚂ 3wt%ߦ߽㆐ߔࠆ੐߇್᣿ߒߚ‫ߩߎޕ‬᭽ߥᐔⴧ⁁ᘒ߆ࠄߩ஍୦ߪ‫ޔ‬ᶐẃᤨ㑆߇Ⴧߔߦ઻޿
ᓢ‫ߦޘ‬ૐਅߔࠆ߇‫ޔ‬ዋߥߊߣ߽ᢙචಽ⒟ᐲ߹ߢߪ᣿ࠄ߆ߦ㕖ᐔⴧ⁁ᘒߦ᦭ࠆߎߣ߇ಽ߆ߞ
ߚ 7)‫⎇ᧄޕ‬ⓥߪ‫ޔ‬એ਄ߩၮ␆⊛ᖱႎࠍ〯߹߃‫ޔ‬ᚒ‫ ߇ޘ‬Fe/Zn ⇇㕙ߩ⎇ⓥߢవߦⴕߞߚߣห᭽ߩ
ᶐẃታ㛎 7,11)ࠍ Zn-0.2wt%Al ᶎਛߢⴕ޿‫⇇ޔ‬㕙ߦᒻᚑߐࠇࠆ⚵❱ߩᄌൻߣỚᐲࡊࡠࡈࠔࠗ࡞ߦߟ޿ߡታ㛎ࠍⴕߞߚ‫ޕ‬㩷㩷䋲㩷 ታ㛎ᣇᴺ㩷㩷 ⚐ᐲ 99.95 wt%ߩ㔚⸃㋕ࡉࡠ࠶ࠢߩ⴫㕙ࠍ⴫ߣⵣ߇ᐔⴕߦߥࠆࠃ߁ߦ⎇⏴ߒߚᓟ‫ޔ‬࿶ᑧᯏߦࠃࠅ᧼ෘߦߒߡ⚂ 85㧑ߩ಄㑆࿶ᑧࠍⴕ޿‫ޔ‬ടᎿ߹߹ߩ⍴ౠ⁁⹜ᢱ㧔0.4×5×40 mm3㧕ࠍ૞⵾ߒߚ‫৻ޕ‬ᣇ‫⚐ޔ‬ᐲ 99.99 wt%ߩ㔚⸃ Zn ߣ 99.7 wt㧑ߩ㔚⸃ Al ߆ࠄ㜞๟ᵄṁ⸃Ἱߦࠃࠅ
Zn-0.2wt%Al ว㊄ࠍ૞⵾ߒߚ‫ߩߘޕ‬ᓟ‫ޔ‬㍌႙߆ࠄಾࠅ಴ߒߚ Zn-Al ว㊄ߣ޽ࠄ߆ߓ߼㧏1500ߩḨᑼ⎇⏴ߦࠃࠅ⴫㕙ࠍᷡᵺൻߒߡ߅޿ߚ⍴ౠ⁁㋕⹜ᢱࠍ౒ߦౝᓘ 10mm‫ޔ‬㐳ߐ 500mm ߩ⍹⧷▤ਛߦ౉ࠇ‫ࠬࠟࡦࠧ࡞ࠕ ޔ‬ਛߢኽ౉ߒߚᓟ‫ޔ‬450͠ߦ⸳ቯߒߚ❑ဳ㔚᳇Ἱߢᶐẃಣℂࠍⴕ
ߞߚ‫ޔߢߎߎޕ‬ᶐẃಣℂߪ‫ޔ‬᳗ਭ⏛⍹ࠍ↪޿ߡ㋕ࠍ⍹⧷▤ߩᄖㇱ߆ࠄ⍹⧷▤ߩ਄┵ߦ଻ᜬߒߚ਄ߢ <P#N ว㊄ࠍ౉ࠇߡ޽ࠆਅ┵ㇱߩߺࠍ㔚᳇Ἱߦᝌ౉ߒߡ ͠ߩ <P#N ᶎࠍ૞ࠅ‫ޔ‬ᦨᓟߦ଻ᜬߒߡ޿ߚ⏛⍹ࠍ㔌ߒ㋕ࠍᶎਛߦ⪭ਅߐߖߡ <P#N ᶎߣߩ෻ᔕࠍ㐿ᆎߐߖࠆᣇᴺࠍ↪޿ߚ‫੍ޕ‬஻ታ㛎ߦࠃࠅ‫(ޔ‬G ᧼ߩ᷷ᐲߪᶐẃᓟᢙ⑽ߢ߶߷ ͠ߦ㆐ߔࠆߎߣ߆ࠄ‫⪭ޔ‬ਅߐߖߚᤨὐࠍᶐẃᤨ㑆ߩ⿠ὐߣߒߚ‫  ࠄ߆⑽ ޕ‬ಽ߹ߢߩ㑆ߢᤨ㑆ࠍᄌ߃ߡᶐẃࠍⴕߞߚᓟ‫⁁ߩߘޔ‬ᘒࠍಓ⚿ߔࠆߚ߼ߦ಴᧪ࠆߛߌ㕒߆ߦ⍹⧷▤ࠍ㔚᳇Ἱ߆ࠄขࠅ಴ߒߡ‫ޔ‬ഀࠄߕߦ᳓ਛߦ὾߈౉ࠇߚ‫ޕ‬ߘߩᓟ‫ޔ‬⍹⧷▤߆ࠄขࠅ಴ߒߚ᫔⁁⹜ᢱߦኻߒᮮᢿ㕙ࠍಾᢿߒ᮸⢽ߦၒ߼ㄟࠎߛ਄ߢ‫⇇ޔ‬㕙ㄭறߩశቇ㗼ᓸ㏜ⷰኤ‫⿛ޔ‬ᩏဳ㔚ሶ㗼ᓸ㏜㧔5'/㧕ߩ෻኿㔚ሶ௝ⷰኤ‫ޔ‬: ✢ࡑࠗࠢࡠࠕ࠽࡜
ࠗࠩ࡯㧔'2/#㧕ߦࠃࠆ⚵ᚑಽᨆࠍⴕߞߚ‫ޔߢߎߎޕ‬శቇ㗼ᓸ㏜ⷰኤߪ 㧑࠽ࠗ࠲࡯࡞ࠍ૶↪
ߒ‫'ޔ‬2/# ಽᨆߪ M8 ߩടㅦ㔚࿶ߢⴕ޿ <P(G#N ߘࠇߙࠇߩ⚐‛⾰ࠍᮡḰ⹜ᢱߣߒߡ↪޿ߚ‫ޕ‬㩷㩷䋳㩷 ⚿ᨐ䈫⠨ኤ㩷㪊㪅㪈㩷 ࿕ᶧ᜛ᢔኻ䈱⚵❱ᄌൻ㩷㩷 㪝㫀㪾㪅㪊 䈲䇮㪈㪌㪇䌾㪍㪇㪇㫊 䉁䈪ᶐẃᤨ㑆䉕ᄌ䈋䈢ᤨ䈱 㪝㪼㪆㪱㫅㪄㪇㪅㪉㫎㫋㩼㪘㫃 ⇇㕙ㄭற䈱శቇ㗼ᓸ㏜⚵❱䈪䈅䉎䇯ታ㛎䉕ⴕ䈦䈢 㪈㪇㫊 䈎䉌 㪈㪌㪇㫊 䉁䈪䈲䇮㪝㫀㪾㪅㪊㩿㪸㪀䈮␜䈜䉋䈉䈮 㪱㫅㪄㪝㪼 ൻว‛ጀ䈱ᒻᚑ䈲⷗䉌䉏䈭䈎䈦䈢䇯㪈㪏㪇㫊 䈮䈍䈇䈩䈲䈇䉒䉉䉎䉝䉡䊃䊋䊷䉴䊃䈫๭䈳䉏䉎ᕆỗ䈭෻ᔕ䈏↢䈛䇮㪝㫀㪾㪅㪊㩿㪹㪀䈱᭽䈮 㪝㪼㪄㪱㫅ൻว‛ጀ䈱ሽ࿷䈏⏕⹺䈘䉏䈢䈏䇮⇇㕙䈱▎ᚲ䈮䉋䉍ൻว‛ጀ䈱ෘ䉂䉇⚵❱䈮䈳䉌䈧䈐䈏䈅䈦䈢䇯㪉㪈㪇㫊 એ㒠䈲 㪝㫀㪾㪅㪊㩿㪺㪀㪃㩿㪻㪀䈮␜䈜䉋䈉䈮ൻว‛ጀ⚵❱䈲䈾䈿ဋ৻䈭ෘ䉂䈫䈭䉍䇮ᤨ㑆䈫䈫䉅䈮ෘ䉂䈏Ⴧട䈚䈢䇯䈭䈍䇮ൻว‛ጀ䈱⋧᭴ᚑ䈮䈧䈇䈩䈲ᓟㅀ䈜䉎䈏䇮㰰䇮㱐䉇㱒䈭䈬䈱᭴ᚑ⋧䈏ጀ⁁䈮ᢛὼ䈫಴⃻䈚䈢 㪝㪼䋯㪱㫅 ⇇㕙䈫䈲⇣䈭䉍䇮ᢙ⋧䈏ᷙ࿷䈜䉎ⶄ㔀䈭⚵❱䈫䈭䈦䈢䇯䉁䈢䇮㪝㫀㪾㪅㪊㩿㪹㪀㩷㪃㩷㩿㪺㪀䈮␜䈜䉋䈉䈮䇮ᄙ䈒䈱႐ว 㪝㪼㪄㪱㫅 ൻว‛ጀ䈫ᶧ⋧䈫䈱Ⴚ⇇ઃㄭ䈮 㪝㪼㪄㪘㫃 ⋧䈏ሽ࿷䈚䈩䈇䈢䇯㩷㧙㧙㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷

(KIMicrostructures of diffusion zone formed in Fe/Zn-0.2wt%Al diffusion couples at㩷

450͠ for (a) 150 s, (b) 180 s, (c) 300 s and (d) 600 s  㩷㩷 㪝㫀㪾㪅㪋 䈲䇮⇇㕙䈮ᒻᚑ䈘䉏䉎 㪝㪼㪄㪱㫅 ൻว‛ጀ䈱ጀෘ䉕ᶐẃᤨ㑆䈮ኻ䈚䊒䊨䉾䊃䈚䈢⚿ᨐ䉕␜䈚䈩䈇䉎䇯䈖䈖䈪䇮㪈㪏㪇㫊䇮㪉㪈㪇㫊䇮㪊㪇㪇㫊 䈪䈲䇮⹜ᢱ▎ᚲ䈮䉋䉍ൻว‛⋧䈱ෘ䉂䈏⇣䈭䉎䈢䉄䈮䈠䈱▸࿐ౝ䉕䉣䊤䊷䊋䊷䈮䉋䉍⴫␜䈚䈢䇯㪝㪼㪄㪱㫅 ൻว‛ጀ䈲 㪈㪏㪇㫊 䈮䈍䈇䈩⓭ὼ಴⃻䈚䇮㪉㪈㪇㫊 એ㒠䈲ᤨ㑆䈮ኻ䈚ቯᏱ⊛䈮ᚑ㐳䈜䉎䈖䈫䈏䉒䈎䉎䇯৻⥸ߦ⇇㕙ጀߩᚑ㐳᜼േߪ‫ޔ‬
w=kxt n            㧔㧝㧕ߦࠃࠅ␜ߐࠇࠆ‫ޔߢߎߎޕ‬w ߪጀෘ‫ޔ‬t ߪᾲಣℂ㧔ᶐẃ㧕ᤨ㑆‫ޔ‬n ߪ෻ᔕᜰᢙ‫ޔ‬k ߪቯᢙߢ޽ࠆ‫⇇ޕ‬㕙⚵ᚑ䈏ᐔⴧ⁁ᘒ䈮ᓥ䈉႐ว䈮䈲䇮૕᜛ᢔ෻ᔕᓞㅦ䈪䈲 n㩷㪔㩷㪈㪆㪉 䈫䈭䉍䇮⇇㕙෻ᔕᓞㅦ䈪䈲n㩷㪔㩷㪈 䉕␜䈜䈖䈫䈏⍮䉌䉏䈩䈇䉎䇯㩷 㪝㫀㪾㪅㪋 䈪䈲䇮ኻᢙ䉫䊤䊐䈫䈚䈩⴫␜䈚䈩䈇䉎䈢䉄䇮෻ᔕᜰᢙ䈲䊒䊨䉾䊃䈱௑䈐䈎䉌᳞䉄䉌䉏䉎䇯㪉 ర♽䈱 㪝㪼䋯㪱㫅 ⇇㕙䈪䈲䇮ᚑ㐳䈲ᶐẃ⋥ᓟ䈎䉌ቯᏱ⊛䈮↢䈛䇮෻ᔕᜰᢙ䈲䈍䈍䉋䈠 n㩷 㪔㩷㪈㪆㪉 䈪䈅䉎䈱䈮ኻ䈚䇮㪱㫅㪄㪘㫃 ᶎ䈪䈲ᶐẃᓟᦼ䈮䈍䈇䈩 n㩷 㪔㩷㪈䇮䈜䈭䉒䈤ᤨ㑆䈮ኻ䈚䈩Ყ଀䈚䈩ᚑ㐳䈜䉎੐䈏᣿䉌䈎䈫䈭䈦䈢䇯㩷㩷㪊㪅㪉㩷 ⇇㕙Ớᐲ䊒䊨䊐䉜䉟䊦㩷㩷 㪝㫀㪾㪅㪌 䈲䇮㩿㪸㪀㪊㪇㫊䇮㩿㪹㪀㪈㪏㪇㫊䇮㩿㪺㪀㪍㪇㪇㫊 䈮䈍䈔䉎⇇㕙ㄭற䈱 㪪㪜㪤 ෻኿㔚ሶ௝䇮䈍䉋䈶 㪝㪼 䈍䉋䈶 㪘㫃 䈱Ớᐲ䊒䊨䊐䉜䉟䊦䉕␜䈚䈩䈇䉎䇯㪝㪼㪄㪘㫃 ㊄ዻ㑆ൻว‛䈏䊐䉞䊦䊛⁁䈮ᒻᚑ䈘䉏䈩䈇䉎䈫⠨䈋䉌䉏䉎ᶐ㩷㧙㧙㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷㩷

(KITime dependence of the layer thickness for the Fe-Zn intermetallic compound layer  .㩷㩷(a) 30 s㩷㩷㩷㩷㩷㩷
㩷(b) 180 s㩷㩷㩷㩷㩷㩷

(c) 600 s㩷㩷㩷㩷㩷㩷
㩷㩷(KIConcentration profiles in the diffusion zone formed in Fe/Zn-0.2wt%Al diffusion㩷

couples immersed at 450͠ for (a) 30 s, (b) 180 s and (c) 600 s .㩷㧙㧙ẃೋᦼ䈮䈍䈔䉎 㫋㩷 㪔㩷 㪊㪇㫊 䈮䈍䈇䈩䈲䇮䋲ర♽ 㪝㪼㪆㪱㫅 ⇇㕙䈱䈗䈒ೋᦼ䈮䉅⷗䉌䉏䈢ᢙ䋦䈮䉅෸䈹ᶧ⋧ਛ䈻䈱 㪝㪼 䈱ṁ⸃䈏⷗䉌䉏䉎䇯࿑䋲䈮␜䈚䈢⁁ᘒ࿑䈪੍ᗐ䈘䉏䉎Ớᐲ䋨㪇㪅㪇㪈䌾㪇㪅㪇㪊䋦䋩䉕䈲䉎䈎䈮⿥䈋䈢 㪱㫅 ᶎ䈻䈱 㪝㪼 䈱ṁ⸃䈲䇮㪝㫀㪾㪅㪌㩿㪹㪀䇮㩿㪺㪀䈮⷗䉌䉏䉎䉋䈉䈮ᶐẃᤨ㑆䈏Ⴧ䈜䈮ᓥ䈇ᰴ╙䈮ᷫዋ䈜䉎䈖䈫䈏䉒䈎䉎䇯㪝㫀㪾㪅㪍 䈲䇮ಽᨆ䈚䈢ో⹜ᢱ䈮䈧䈇䈩ᶧ⋧஥䈱 㪝㪼 Ớᐲ䉕࿕ᶧ⇇㕙䈮ᄖᝌ䈚䈩ᓧ䈢⇇㕙⚵ᚑ䉕␜䈚䈩䈇䉎䇯⇇㕙䈱ᶧ⋧ 㪝㪼 Ớᐲ䈲䇮㪝㫀㪾㪅㪋 䈪␜䈘䉏䈢 㪝㪼㪄㪱㫅 ൻว‛⋧ᒻᚑ䈱ẜફᦼ䈮䈍䈇䈩䈲⚂ 㪊䋦⒟ᐲ䈫䈾䈿৻ቯ䈪䈅䉎䈏䇮⍫ශ䈱 㪈㪏㪇㫊 䈪䈲 㪝㪼㪄㪱㫅 ൻว‛⋧䈱ෘ䈘䈮䉋䈦䈩⇣䈭䉎௑ะ䉕␜䈚䈢䇯䉁䈢䇮䈠䉏એ਄䈱㗔ၞ䈪䈲䇮ᶐẃᤨ㑆䈮ᓥ䈇ᓢ䇱䈮⇇㕙⚵ᚑ䈱ૐਅ䈏⷗䉌䉏䈢䇯䈖䈖䈪䇮㪊㪇㪇㫊 એ਄䈱㗔ၞ䈪䈲䇮ὐ✢䈪␜䈚䈢䋲ర♽ 㪝㪼㪆㪱㫅 䈱Ớᐲ䈫䈾䈿৻⥌䈜䉎䇯䋲ర♽ 㪝㪼㪄㪱㫅 ⇇㕙䈪䈲䇮ᶧ⋧⇇㕙䈱 㪝㪼 Ớᐲ䈲ൻว‛ጀ䉕ᮮಾ䉎ṁ⾰䈱ᵹ᧤䈮Ყ଀䈚䈢䈏䇮ᧄ⚿ᨐ䉋䉍䇮㪱㫅㪄㪘㫃 ᶎ䉕↪䈇䈢႐ว䈪䉅䇮⇇㕙⚵ᚑ䈱஍୦䈲ห᭽䈱ℂ↱䈮䉋䉍↢䈛䈩䈇䉎䈖䈫䈏␜ໂ䈘䉏䉎䇯㩷㩷 㪝㫀㪾㪅㪋 䈮⷗䉌䉏䉎䉋䈉䈮䇮ᶐẃᤨ㑆䈏 㪈㪏㪇㫊 䈮⥋䉎䈫䉝䉡䊃䊋䊷䉴䊃䈫๭䈳䉏䉎ᕆỗ䈭 㪝㪼㪄㪱㫅 ൻว‛ጀ䈱ᒻᚑ䈏↢䈛䉎䇯䈖䈱䉝䉡䊃䊋䊷䉴䊃෻ᔕ䈲ዋ䈭䈒䈫䉅 㪈㪌㪇㫊䋭㪉㪈㪇㫊 䈱⍴ᤨ㑆ౝ䈪⚳ੌ䈚䈩䈇䉎䈖䈫䈎䉌䇮᣿䉌䈎䈮ᑼ㩿䋱㪀䉕䉅䈦䈩⼏⺰䈘䉏䉎䉋䈉䈭ቯᏱ⊛䈭⇇㕙෻ᔕ䈪䈲䈭䈇䇯㪱㫅 䈮 㪘㫃 䉕ᷝട䈚䈢႐ว䇮ᶧ⋧ਛ䈱 㪝㪼 ṁ⸃ᐲ䈲 㪝㪼㪄㪱㫅䋲ర♽䈮Ყ䈚䈩ᷫዋ䈜䉎䈖䈫䈏⍮䉌䉏䈩䈍䉍䇮㪝㫀㪾㪅㪌 䈮␜䈚䈢ᶧ⋧ਛ䈮䈍䈔䉎㪝㪼 Ớᐲ䊒䊨䊐䉜䉟䊦䉋䉍䇮⇇㕙䈎䉌䈎䈭䉍䈱〒㔌䈮ᷰ䉍 㪝㪼㪄㪱㫅 ൻว‛ጀ䈱ㆊ㘻๺ၞ䉕ᒻᚑ䈚䈩䈇䉎䈲䈝䈪䈅䉎䇯䈖䈖䈪䇮䉝䉡䊃䊋䊷䉴䊃⋥ᓟ䈱⇇㕙⚵ᚑ䋨⚂ 㪇㪅㪌䋦䋩䉕䉝䉡䊃䊋䊷䉴䊃ਛ䈱⷗䈎䈔਄䈱 㪝㪼 ṁ⸃ᐲ䈫⠨䈋䉏䈳䇮㪝㫀㪾㪅㪎 䈮␜䈜䉋䈉䈮࿕ᶧ⇇㕙䈎䉌⚂ 㪈㪊P㫄 䉁䈪䈏ㆊ㘻๺⁁ᘒ䈮䈭䈦䈩䈇䉎䈫⷗Ⓧ䉌䉏䉎䇯䈖䈱㗔ၞ᏷䈲䇮㪝㫀㪾㪅㪋 䈮␜䈚䈢䉝䉡䊃䊋䊷䉴䊃䈮䉋䉍ᕆỗ䈮↢䈛䉎ൻว‛ጀ䈱ෘ䈘䈮䈍䈍䉋䈠╬䈚䈇䈖䈫䈎䉌䇮䉝䉡䊃䊋䊷䉴䊃䈲 㪝㪼㪄㪘㫃 ൻว‛䊋䊥䉝ጀ䈱ሽ࿷䈮䉋䉍 㪱㫅㪄㪘㫃 ᶎਛ䈮ᒻᚑ䈘䉏䈢࿕⋧ㄭற䈱㪝㪼 ㆊ㘻๺ၞ䈮䈍䈇䈩䇮㪝㪼㪄㪱㫅 ൻว‛ጀ䈏৻᜼䈮ᒻᚑ䈘䉏䉎⃻⽎䈪䈅䉎䈫ℂ⸃䈪䈐䉎䇯㩷㩷㩷
㩷
㩷㩷㩷㩷
㩷
㩷㩷
㩷
㩷
(KISupersaturated zone evaluated from㩷㩷(KIInterface concentrations of Fe for thethe effective solubility (about 0.5wt%Fe) at

㩷]+L/L interfaces against the immersion

180 s, which is indicated in the concentration

㩷time .

profile of Fe in the liquid phase for 30 s㩷

immersion specimen .㩷㧙㧙㪊㪅㪊㩷 ᶧ⋧ਛ䈮䈍䈔䉎 㪘㫃 䈱᜛ᢔ᜼േ䈫 㪝㪼㪄㪘㫃 ጀ䈱቟ቯᕈ㩷㩷 㪝㫀㪾㪅㪌㩿㪸㪀䈪䈲䇮ᶧ⋧ਛ䈱 㪘㫃 䉅 㪝㪼 䈫㘃ૃ䈚䈢䉴䊌䉟䉪ᒻ⁁䉕␜䈜䈖䈫䈏䉒䈎䈦䈢䇯ṁ⾰㊂䊋䊤䊮䉴䈱ⷰὐ䈮䉋䉍䇮䈖䈱䉋䈉䈭 㪘㫃 䈱Ớᐲ䊒䊨䊐䉜䉟䊦ᒻ⁁䈎䉌䇮⇇㕙ㄭற䈱ᶧ⋧ਛ䈮䈍䈔䉎 㪘㫃 ේሶ䈲䇮㪘㫃⥄り䈱Ớᐲ൨㈩䈮ㅒ䉌䈦䈩⒖േ䈜䉎ㅒ᜛ᢔ䉕↢䈛䈩䈇䉎䈫⠨䈋䉌䉏䉎䇯䋳ర♽䈮䈍䈔䉎ṁ⾰䈱⋧੕᜛ᢔ䈲䇮䈠䈱ర⚛⥄૕䈱Ớᐲ൨㈩એᄖ䈮ઁ䈱ṁ⾰ర⚛䈱Ớᐲ൨㈩䈮䉋䈦䈩䉅⺃⿠䈘䉏䉎䈖䈫䈏⍮䉌䉏䈩䈇䉎䇯䈖䈱䉋䈉䈭⃻⽎䈱⸃ᨆ䈮䈲䇮⃻⽎⺰⊛⠨ኤ䈏᦭↪䈪䈅䉎䇯੹࿁䈱 㪱㫅㪄㪝㪼㪄㪘㫃䋳ర♽䈮ㆡ↪䈜䉎䈫䇮ṁ⾰ర⚛ 㪘㫃 䈱⋧੕᜛ᢔᵹ᧤䈲䇮੤Ꮕ㗄䉕ήⷞ䈜䉎䈖䈫䈮䉋䉍䇮㩷㩷w ( P Al  P Zn )~J Al |  L AlAlwx

 M Al c Alw'P Al㪃㩷 㩷 㩷 㩷 㩷 㩷 㩷 㩷 㩷 㩷 㩷 㩷 㩷 㩷 㩷 㩷 㩿䋴㪀㩷wx㩷䈪ㄭૃ⊛䈮ਈ䈋䉌䉏䉎 㪈㪉㪀䇯䈖䈖䈪䇮㪣㪘㫃㪘㫃 䈲⃻⽎ଥᢙ䈪䈅䉍 㪘㫃 䈱ේሶᤃേᐲ 㪤㪘㫃 䈫Ớᐲ 㪺㪘㫃 䈱Ⓧ䈮䉋䈦䈩ਈ䈋䉌䉏䇮P㪘㫃 䈍䉋䈶P㪱㫅 䈲䈠䉏䈡䉏 㪘㫃 䈫 㪱㫅 䈱ൻቇ䊘䊁䊮䉲䊞䊦䈪䈅䉎䇯ᑼ䋴䈲䇮ೋᦼ⁁ᘒ䈮䈍䈇䈩 㪘㫃 䈱Ớᐲ䈏৻ቯ䈪䈅䈦䈩䉅䇮㪝㪼 䈱Ớᐲᄌൻ䈮䉋䈦䈩'P㪘㫃 䈏ᄌൻ䈜䉎䈭䉌䈳䇮䈠䉏䈮⺃⿠䈘䉏䈩㪘㫃 䈱᜛ᢔ䈏↢䈛䉎੐䉕ᗧ๧䈚䈩䈇䉎䇯䈚䈢䈏䈦䈩䇮㪝㪼 䈱ᕆỗ䈭Ớᐲ൨㈩䈱ሽ࿷䈮⺃⿠䈘䉏䈩 㪘㫃 䈱䉴䊌䉟䉪⁁䊒䊨䊐䉜䉟䊦䈏಴⃻䈜䉎႐ว䇮⇇㕙ㄭற䈱 㪘㫃 䈲╬'P㪘㫃 ✢䈮ᴪ䈦䈢᜼േ䉕␜䈜䈫⠨䈋䉌䉏䉎䇯⸘▚⁁ᘒ࿑䋨㪚㪘㪣㪧㪟㪘㪛䋩ᴺ䈮䉋䉍ᶧ⋧䈮䈧䈇䈩䈱ᦨᣂ䈱ᾲജቇ䊂䊷䉺 㪈㪇㪀䉕↪䈇䈩ᓧ䈢╬'P㪣㪘㫃 ✢䋨⎕✢䋩䈎䉌䇮৻ቯỚᐲ䈱 㪘㫃 䈮䈍䈇䈩䈲 㪝㪼 Ớᐲ䈏㜞䈇䈾䈬 㪘㫃 䈱ൻቇ䊘䊁䊮䉲䊞䊦䈏ૐਅ䈜䉎௑ะ䈏⏕⹺䈘䉏䈢 㪐㪀䇯㩷㩷 એ਄䈱⚿ᨐ䈎䉌䇮㪱㫅㪄㪘㫃 ᶎ䈮䈍䈇䈩Ყセ⊛㐳ᤨ㑆䉁䈪䊐䉞䊦䊛⁁ 㪝㪼㪄㪘㫃 ൻว‛ጀ䈏⇇㕙䈮ሽ࿷䈚䈉䉎䈱䈎䈠䈱৻┵䈏ℂ⸃䈪䈐䉎䇯䈜䈭䉒䈤䇮ᶐẃ⋥ᓟ䈮ᶧ⋧ਛ䈮ᒻᚑ䈘䉏䉎ᕆፋ䈭 㪝㪼 Ớᐲ䊒䊨䊐䉜䉟䊦䈮⺃⿠䈘䉏䈩⋥䈤䈮 㪘㫃 䈏⇇㕙䈮ㆇ䈳䉏 㪝㪼㪄㪘㫃 ൻว‛⋧䈏䊐䉞䊦䊛⁁䈮ᒻᚑ䈘䉏䉎䇯㪝㪼㪄㪘㫃 ൻว‛⋧䈲䇮⇇㕙䉣䊈䊦䉩䊷䉕ᷫዋ䈘䈞䉎䈢䉄䈮Ᏹ䈮ಝ㓸䈚䉋䈉䈫䈜䉎䈲䈝䈣䈏䇮㪱㫅 ᶎਛ䈮 㪝㪼 䈱ᕆỗ䈭Ớᐲᄌൻ䈫ㆡ㊂䈱 㪘㫃 䈏ሽ࿷䈜䉎㒢䉍䇮㪘㫃 䈲Ᏹ䈮⇇㕙䈮ャㅍ䈘䉏䉎䈱䈪 㪝㪼㪄㪘㫃 ൻว‛䈱䊐䉞䊦䊛⁁⚵❱䈲቟ቯ䈮ሽ࿷䈚⛯䈔䉎੐䈏น⢻䈪䈅䉐䈉䇯䈚䈎䈚䇮৻ᣤ䊋䊥䉝䈏⎕䉏 㪝㪼㪄㪱㫅 ൻว‛䈱ᒻᚑ䈏ᆎ䉁䉎䈫䇮㪝㫀㪾㪅㪍 䈮␜䈜䉋䈉䈮ᶧ⋧ਛ䈮⸃䈔಴䈜 㪝㪼 Ớᐲ䈲ỗᷫ䈚Ớᐲ䊒䊨䊐䉜䉟䊦䈲䈭䈣䉌䈎䈮䈭䉎䈢䉄䇮⇇㕙䈻䈱 㪘㫃 䈱ଏ⛎䈏ᛥ೙䈘䉏 㪝㪼㪄㪘㫃 ൻว‛䈱ᒻᚑ䈏࿎㔍䈫䈭䉍䇮㪝㪼䋯㪱㫅 㑆䈱෻ᔕ䈏䈘䉌䈮ㅴⴕ䈜䉎䈫⠨䈋䉌䉏䉎䇯ᓥ䈦䈩䇮㪝㪼㪄㪘㫃 ൻว‛⋧䉕䊋䊥䉝ጀ䈫䈚䈩೑↪䈜䉎䈢䉄䈮䈲䇮ᶧ⋧ਛ䈱 㪝㪼 䈫 㪘㫃䈱ỚᐲಽᏓ䈏㊀ⷐ䈪䈅䉎䈫⚿⺰䈪䈐䉎䇯㩷㩷㪋㪅㩷 ⚿⺰㩷⚐ 㪝㪼 ᧼䉕 㪋㪌㪇㷄䈱 㪱㫅㪄㪇㪅㪉㫎㫋㩼㪘㫃 ᶎ䈮ᶐẃ䈚䈢႐ว䈮䈲䇮᣿⍎䈭 㪝㪼㪄㪱㫅 ൻว‛䈱ᒻᚑ䈲ᶐẃ㐿ᆎᓟ 㪈㪏㪇㫊 䈮䈍䈇䈩ᆎ䉁䉍䇮⋥䈤䈮ᢙචP㫄 䉁䈪䈱ᚑ㐳䈏↢䈛䈢䈏䇮䈠䈱ᓟ䈲ᶐẃᤨ㑆䈮Ყ଀䈚䈩ൻว‛ጀ䈱ෘ䉂䈏Ⴧട䈚䈢䇯⇇㕙ㄭற䈱Ớᐲ䊒䊨䊐䉜䉟䊦䉕⺞ᩏ䈚䈢⚿ᨐ䇮㪝㪼㪄㪱㫅 ൻว‛ጀ䈏ᒻᚑ䈘䉏䉎䉁䈪䈲䇮䋳㫎㫋䋦䉅䈱㜞Ớᐲ䈱 㪝㪼 䈏ᶧ⋧䈮ṁ⸃䈚䈩䈇䉎䈖䈫䈏್᣿䈚䈢䇯䈖䈱᭽䈭 㪝㪼 䈱ㆊ㘻๺⁁ᘒ䈲䇮㪝㪼㪄㪱㫅 ൻว‛ጀ䈱಴⃻䈮䉋䉍⪺䈚䈒ᷫዋ䈜䉎䇯䉁䈢䇮㪈㪏㪇㫊 એ೨䈱ᶐẃೋᦼ䈮䈍䈇䈩 㪝㪼 䈱Ớᐲ䊒䊨䊐䉜䉟䊦䈫㘃ૃ䈚䈢䉴䊌䉟䉪⁁䈱Ớᐲ䊒䊨䊐䉜䉟䊦䈏 㪘㫃 䈮䈧䈇䈩䉅⏕⹺䈘䉏䈢䇯䈖䈱ේ࿃䈲䇮㪝㪼Ớᐲ䈱ᕆỗ䈭ᄌൻ䈮⺃⿠䈘䉏䈢 㪘㫃 䈱ㅒ᜛ᢔ䈮䉋䉎䈫⠨䈋䉌䉏䉎䇯䈖䈱᭽䈭 㪘㫃 䈱᜛ᢔ䈲䇮㍑᧼䈱⴫㕙㧙㧙䈮Ᏹ䈮 㪘㫃 䉕ଏ⛎䈜䉎䈖䈫䈮䈭䉎䈱䈪䇮㪝㪼㪄㪘㫃 ൻว‛䊋䊥䉝ጀ䈱⎕უ䉕ᛥ೙䈜䉎૞↪䈏䈅䉎䈫⠨䈋䉌䉏䉎䇯㩷㩷㩷 ᧄ⎇ⓥ䈲䇮䋨⽷䋩㪡㪝㪜㪉㪈 ਎♿⽷࿅ 㪉㪇㪇㪎 ᐕᐲᛛⴚ⎇ⓥഥᚑ䈱ᡰេ䈮䉋䉍ⴕ䉒䉏䈢䇯䈖䈖䈮䇮ᗵ⻢䈱ᗧ䉕⴫䈜䉎䇯㩷㩷ᒁ↪ᢥ₂㩷
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