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SciELO
10 天
Matéria (Rio de Janeiro), Volume: 27, Número: 1, Publicado: 2022
RESUMO A extensa utilização do concreto no mundo provoca a geração de grandes quantidades de resíduos, vinculada a sua produção e utilização. Hoje, esse resíduo é subestimado, porém em alguns países o ...
来自MSN
18 天
千年锈色耐人寻——解开古代铜锡铅合金锈蚀谜题
由于青铜本体合金成分的差异,及其所处环境的不同,铜锈的确有很多种:红色的赤铜矿(Cu2O)、黑色的黑铜矿(CuO ... 历经数千年而不朽的现象,真值得好好研究一番。 图17 合金残片截面SEM背散射图像(边缘深色区为锈层) 图18打磨表面后的锡铅合金残片 ...
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