Journal of Conservation Science Vol.30 No.4 pp.417-425
Cu-Sn 청동기의 미세조직 변화 양상이 색도 변화에 미치는 영향
Effect of Changes on Color Characteristics by Microstructural Transformations of Cu-Sn Bronzes
Jae-Sung Lee,Jang-Sik Park
Abstract
Color characteristics of the Cu-Sn alloys (bronze) in as-cast conditions were determined by reference to the L*, a*, b* color space. Results show that the values of a* and b* decrease with the increase in Sn levels, indicating that the colors of bronze alloys are increasingly away from red and yellow with the increase in the fraction of the δ phase while the opposite is true with the α phase. It has also been found in similar experiments with the Cu-22% Sn alloys that heat treatments in varying conditions produce subtle differences in their color characteristics as observed in the L*, a*, b* color space, due likely to the formation of various phases in different fractions.