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Korean Journal of Metals and Materials > Volume 54(12); 2016 > Article
Korean Journal of Metals and Materials 2016;54(12): 937-943. doi: https://doi.org/10.3365/KJMM.2016.54.12.937
한국 방짜기술의 출현과정에 관한 금속학적 연구: 국립경주박물관 부지 출토 통일신라 청동유물을 기준으로
박장식1, 주진옥2
1홍익대학교 세종캠퍼스 금속공학과
2(재)신라문화유산연구원 보존연구팀
Evolution of High Tin Bronze Technology in Korea as Observed in Bronze Objects of the Unified Silla Period, Excavated from the National Gyongju Museum Site
Jang Sik Park1, Jin Ok Joo2
1Department of Metallurgical Engineering, Hongik University, Sejong 30016, Republic of Korea
2Foundation of Silla Cultural Heritage Research Institute, Gyongju 38166, Republic of Korea
Correspondence  Jang Sik Park ,Tel: +82-44-860-2562, Email: jskpark@hongik.ac.kr
Received: 27 May 2016;  Accepted: 16 June 2016.  Published online: 5 December 2016.
ABSTRACT
Korea is famous for its long history of manufacturing high tin bronze objects of near peritectic composition by the application of forging and rapid cooling at approximately 700 °C. Not much is known, however, of the origin and developmental processes of this technique. Fortunately, valuable evidence for assessing the associated technological evolution was found by examining the microstructure and chemistry of bronze objects excavated in the National Gyongju Museum construction site. Initial awareness of the technique was clearly visible in the selection of unleaded high tin bronze alloys of varying tin levels and the application of special thermo-mechanical treatments involving forging and quenching from the α-β or α-γ phase field of the Cu-Sn system. This observation along with the excavation contexts suggests that the high tin technology was gradually established in Korea by a long period of experimentation, starting from the 8th century AD or earlier.
Keywords: Korea, high tin bronze, technological evolution
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