结晶器是连铸的重要部件，其质量决定了铸坯的好坏.镍钴合金因其优异的性能，近年来已成为结晶器铜板的主流镀层.采用扫描电镜和显微硬度计表征了一种Ni-38.6％Co结晶器镀层组织结构和显微硬度，通过CETR-UMT-3型摩擦磨损试验机研究了在不同载荷、频率与摩擦副下的耐磨性.结果 表明：用显微硬度计测得镀层显微硬度为428Hv；施加的载荷和频率增大，镍钴合金镀层磨损体积随之增大；磨损主要呈现出粘着磨损
随着薄膜材料的不断发展,对薄膜材料断裂行为和抗冲击疲劳的研究也愈加重要。采用磁控溅射技术在单晶Si基体上沉积了TiN/CrN多层复合薄膜,采用透射电子显微镜观察了薄膜截面结构细节,利用连续刚度法获得薄膜的硬度及弹性模量,采用纳米压痕仪研究了布氏压头下薄膜的开裂行为,根据布氏压头的几何模型校准了裂纹并计算了薄膜的断裂韧性,通过不同载荷的纳米冲击测试研究了薄膜的疲劳性能,并采用扫描电子显微镜观察了薄膜
研究了AA2024-T3高强铝合金搅拌摩擦焊接头在三种不同腐蚀溶液中(3.5wt％NaCl、3.5wt％NaCl+1wt％HCl、EXCO)的腐蚀行为，分析了接头微观组织、腐蚀行为及力学性能的相关性.研究结果表明，接头不同组织区域的腐蚀特征明显不同，由于母材和热影响区表面存在包铝层，其耐腐蚀性能优于焊核与热力影响区；由于第二相粒子发生固溶可有效降低基体电极电位，导致了焊核耐蚀性优于热力影响区；受到
Among the rare earth oxide, Gadolinium Oxide (Gd2O3) has attractive feature for optical and electronic applications. It mainly has three crystal orientations, cubic, monoclinic and hexagonal. In this
The interest in transparent electronic technologies surrounds many urgent optoelectronic device applications. The key components of plasmonic materials of conventional semiconductors are wide band gap
Highly infrared transparent and protective Hafnium Oxynitride (HfOxNy) coatings were deposited on fused quartz and ZnS substrates by reactive magnetron sputtering. Based on the x-ray diffraction, Four
With the increasing demand for industrial product quality and safety verification, conventional nondestructive testing (NDT) technology is hardly able to fulfil the specialized requirements such as re
钛合金由于具有密度小、比强度高、耐腐蚀等优异性能而被誉为"宇宙金属",但钛合金的低耐磨性限制了其更广泛的应用。随着航空航天科技的飞速发展,对钛合金的性能也提出了更高的要求。本研究利用激光技术在TC4钛合金样品表面刻蚀出间距分别为100μm,200μm,300μm,直径分别为100μm,150μm,200μm的点阵型织构和宽度分别为100μm,150μm,200μm的沟槽型及网格型织构,基于CSM摩
J55 steel pipe is a sort of oil extraction equipment which is commonly used for oil-pumping operation on some oil fields. Nonetheless, it is acknowledged that this kind of material is easily corroded