Calculation of the coefficient and dynamics of water diffusion in graphite joints

The coefficient and dynamics of water diffusion in adhesive-graphite joints were calculated in-situ with energy dispersive X-ray (EDX) analysis, a method that is significantly simpler than elemental analysis. Water diffusion coefficient and dynamics of adhesive-graphite joints treated by different surface treatment methods were also investigated. Calculation results indicated that the water diffusion rate in adhesive-graphite joints treated by sandpaper was higher than that treated by chemical oxidation or by silane couple agent. Also the durability of graphite joints treated by coupling agent is superior to that treated by chemical oxidation or sandpaper burnishing.

剥茧蛀石

有一个现象十分有趣,特别是在看过了更多的古罗马时期的大理石雕塑之后,你会发现石头也可能会有像木头一样被蛀虫蛀过的痕迹（图1）。以我有限的眼界和粗略的观察,这一现象只存在于古罗马时期的大理石雕塑和大理石建筑装饰上,之前之后,或其他地区并不多见。