Ä¡°ú¿ë °íÄ«¶óÆ® Au-Ag-Pt-Zn ÇÕ±ÝÀÇ ½ÃÈ¿°æÈ °Åµ¿
Age-hardening Behaviour in a Dental High-carat Au-Ag-Pt-Zn Alloy
¼Ò¼Ó »ó¼¼Á¤º¸
¹®Èñ¸¸/Hi Man Moon
¼Õ±¹Çö/¹ÚÂù¾Æ/±è±âö/¹Ú¿µÈ¯/ÀÌÈñ°æ/±èÇüÀÏ/Kuk Hyeon Son/Chan A Park/Gi Chul Kim/Young Hwan Park/Hee Kyung Lee/Hyung Il Kim
KMID : 0362220020290030229
Abstract
µ¿ÀÌ Ã·°¡µÇ¾î ÀÖÁö ¾Ê°í ´ë½Å¿¡ ¹é±Ý°ú ¾Æ¿¬ÀÌ »ó´ëÀûÀ¸·Î ¸¹ÀÌ Ã·°¡µÈ Ä¡°úÁÖÁ¶¿ë °íÄ«¶óÆ® Au-Ag-Pt-Zn ÇÕ±Ý (71.0wt% Au-10.0wt% Ag-12.9wt% Pt-4.0wt% Zn-2.0wt% Pd-0.1wt% Ir)ÀÇ µî¿Â½ÃÈ¿°æÈ °Åµ¿°ú »óº¯Å¿ÍÀÇ °ü°è¸¦ °æµµ ½ÃÇè, X¼±È¸Àý ½ÇÇè,
ÁÖ»çÀüÀÚÇö¹Ì°æ
°üÂû·Î Á¶»çÇÏ¿©, ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò¾ú´Ù.
1. 900¡É¿¡¼ ¿ëüÈó¸®µÈ ½ÃÆíÀ» 450~550¡É¿¡¼ ½Ãȿó¸®Çϸé, ¸é½ÉÀԹ汸Á¶ÀÇ Au-rich ¥á0»ó°ú ¸é½ÉÀԹ汸Á¶ÀÇ Pt3Zn ±ÔÄ¢»óÀ¸·Î µÈ 2»ó °øÁ¸ÀÌ ¸é½ÉÀԹ汸Á¶ÀÇ Au-rich ¥á1»ó°ú ¸é½ÉÁ¤¹æ±¸Á¶ÀÇ PtZn ±ÔÄ¢»óÀ¸·Î µÈ
2»ó°øÁ¸À¸·Î
º¯ÅÂÇÏ¿´´Ù.
2. °æÈ´Â Au-rich ¥á0»ó¿¡¼ PtZn ±ÔÄ¢»óÀÇ ±ÕÀÏ ÇÙ»ý¼º¿¡ ±âÀÎÇÏ¿´´Ù.
3. ½Ãȿó¸® ½Ã°£À» ¿¬ÀåÇÔ¿¡ µû¶ó »ý±â´Â °ú½ÃÈ¿ ¿¬È´Â Au-rich ¥á0»óÀÇ °áÁ¤ ÀÔ°è¿¡¼ Au-rich ¥á1»ó°ú PtZn ±ÔÄ¢»óÀ¸·Î µÈ ¹Ì¼¼ÇÑ nodule»ó ¼®Ãâ¹°ÀÇ ºÒ±ÕÀÏÇÏ°Ô Çü¼ºµÇ´Â °Í°ú ÀÌ¾î¼ ÀϾ´Â ÀÔ°è¼®Ãâ¹°ÀÇ Á¶´ëÈ¿¡ ±âÀÎÇÏ¿´´Ù.
Isothermal age-hardening behaviour and the phase transformation in a dental casting high-carat Au-Ag-Pt-Zn alloy (71.0wt% Au-10.0wt% Ag-12.9wt% Pt-4.0wt% Zn-2.0wt% Pd-0.1wt% Ir) was investigated by means of hardness testing, X-ray diffraction
study
and
scanning electron microscopic observations. By the isothermal ageing at 450~550¡É of the specimen solution-treated at 900¡É, two phase of the Au-rich ¥á0 phase with a face-centered cubic structure and the Pt3Zn ordered phase
with a
face-centered cubic structure were transformed into two phase of the Au-rich ¥á1 phase with face-centered cubic structure and the PtZn ordered phase with a face-centered tetragonal structure. Herdening seemed to be attributed to the
homogeneous uncleation of the PtZn ordered phase from the Au-rich ¥á0 phase. Overageing with softening occurred following prolonged ageing was due to the heterogeneous formation and coarsening of the fine nodular precipitates composed
of
Au-rich ¥á1 phase and the PtZn ordered phase at grain boundaries of the Au-rich ¥á0 phase.
Å°¿öµå
±ÕÀÏ ÇÙ»ý¼º; ±ÝÇÕ±Ý; ½ÃÈ¿°æÈ; PtZn»ó; age-hardening; gold alloy; homogeneous nucleation; PtZn phase;
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