±Ý¼Ó-¼¼¶ó¹Í¿ë Pd-Ag-Sn-Au°è ÇÕ±ÝÀÇ ¸ðÀǼҼº ½Ã »êÈó¸® ÈÄ ±Þ·©¿¡ ÀÇÇÑ °æÈ È¿°ú
The hardening effect by ice-quenching after oxidation of a Pd-Ag-Sn-Au metal-ceramic alloy during porcelain firing simulation
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½ÅÇýÁ¤ ( Shin Hye-Jung ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úÀç·áÇб³½Ç
±è¹ÎÁ¤ ( Kim Min-Jung ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úÀç·áÇб³½Ç
±Ç¿ëÈÆ ( Kwon Yong-Hoon ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úÀç·áÇб³½Ç
±èÇüÀÏ ( Kim Hyung-Il ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úÀç·áÇб³½Ç
¼³È¿Á¤ ( Seol Hyo-Joung ) - ºÎ»ê´ëÇб³ Ä¡ÀÇÇÐÀü¹®´ëÇпø Ä¡°úÀç·áÇб³½Ç
Abstract
º» ¿¬±¸¿¡¼´Â Æ÷¼¼¸° ¼Ò¼º°úÁ¤ µ¿¾È ±Ý¼ÓÇϺα¸Á¶¹°ÀÇ °æµµ°¡ ÇÏ°ÇÏ´Â ¹®Á¦Á¡À» °³¼±Çϱâ À§ÇØ ¸ðÀǼҼº ½Ã »êÈó¸® ´Ü°è¿¡¼ ¼³Ã(bench cooling) ´ë½Å ±Þ·©(ice-quenching)À¸·Î ÇÕ±ÝÀ» ³Ã°¢½ÃÅ´À¸·Î½á ³ª¸ÓÁö ¼Ò¼º´Ü°è µ¿¾È °æÈÈ¿°ú¸¦ ¾òÀ» ¼ö ÀÖÀ» °ÍÀ¸·Î ¿¹ÃøÇÏ°í, À̸¦ È®ÀÎÇϱâ À§ÇØ ½ÇÇèÀ» ÁøÇàÇÏ¿´´Ù. º» ¿¬±¸¿¡¼´Â Pd-Ag-Sn-Au°è ±Ý¼Ó-¼¼¶ó¹Í¿ëÇÕ±ÝÀ» »ç¿ëÇÏ¿© ½ÇÇèÀ» ÁøÇàÇÏ¿© ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò¾ú´Ù. »êÈó¸® ÈÄ stage 0À¸·Î ³Ã°¢ÇÑ ½ÃÆí°ú »êÈó¸® ÈÄ ±Þ·©ÇÑ ½ÃÆíÀ» glaze±îÁö ¸ðÀǼҼºÇÑ °á°ú, µÎ ½ÃÆí ¸ðµÎ ¼Ò¼º ù ´Ü°è¿¡¼ °æµµ°¡ »ó½ÂÇÑ ÈÄ Áö¼ÓÀûÀ¸·Î °æµµ°¡ ÇÏ°ÇÏ¿´À¸³ª, »êÈó¸® ÈÄ ±Þ·©ÇÑ ½ÃÆíÀÇ ÃÖÁ¾ °æµµ°¡ ´õ ³ô°Ô ³ªÅ¸³µ´Ù. ¼Ò¼º ù ´Ü°è¿¡¼ ÀÏ¾î³ °æµµÀÇ »ó½ÂÀº ¸é½ÉÀԹ汸Á¶ÀÇ Pd-Ag-rich ±âÁö¿¡¼ ¸é½ÉÁ¤¹æ±¸Á¶ÀÇ Pd3(Sn, Ga, In)»óÀÇ ¼®Ãâ·Î ÀÎÇØ ±âÁö¿Í ¼®Ãâ¹°°£ÀÇ °è¸é¿¡ »ý¼ºµÈ °ÝÀÚº¯Çü¿¡ ±âÀÎÇÏ¿´´Ù. ¸ðÀǼҼº°úÁ¤¿¡ µû¸¥ °æµµÀÇ ÇÏ°Àº ¼®Ãâ¹°ÀÌ Á¶´ëȵʿ¡ µû¶ó ¼®Ãâ¹°°ú ±âÁö»çÀÌÀÇ °è¸éÀÇ ¸éÀûÀÌ °¨¼ÒµÇ¾î °ÝÀÚ µÚƲ¸²ÀÌ ÇØ¼ÒµÈ °Í¿¡ ±âÀÎÇÏ¿´´Ù.
The hardening effect by ice-quenching after oxidation of a Pd-Ag-Sn-Au metal-ceramic alloy during porcelain firing simulation was investigated by means of hardness test, field emission scanning electron microscopic observations, and X-ray diffraction analysis. The hardness decreased by ice-quenching after oxidation, which was induced by the homogenization of the ice-quenched specimen. The decreased hardness by ice-quenching after oxidation was recovered from the wash stage which was the first stage of the remaining firing process for bonding porcelain. After wash stage, the hardness of the ice-quenched specimens decreased during the subsequent porcelain firing process. But the final hardness of the ice-quenched specimens after oxidation was higher than that of the specimens cooled at stage 0 after oxidation. The increase in hardness of the specimens during the first firing process was caused by the lattice strains generated at the interface between the face-centered cubic Pd-Ag-rich matrix and the face-centered tetragonal Pd3(Sn, Ga, In) precipitate. The decrease in hardness of the specimens during the remaining firing process was caused by the microstructural coarsening.
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Pd-Ag-Sn-Au ±Ý¼Ó-¼¼¶ó¹Í ÇÕ±Ý; ±Þ·©; ¸ðÀǼҼº; ¼®Ãâ°æÈ
Pd-Ag-Sn-Au metal-ceramic alloy; ice-quenching; porcelain firing simulation; precipitation hardening
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