模锻工艺对高温合金性能的影响

就模锻加热工艺 ,模锻变形工艺 ,模锻冷却工艺对 GH36、GH132、GH4 133B等合金的组织和性能的影响作了说明     

用自腐蚀电位预测LY12CZ铝合金的腐蚀损伤

研究了ＬＹ１２ＣＺ铝合金在ＥＸＣＯ溶液中的自腐蚀电位和最大腐蚀深度随浸泡时间的变化关系。结果表明,ＬＹ１２ＣＺ铝合金在ＥＸＣＯ溶液中的腐蚀动力学可分为两个阶段,浸泡前期,腐蚀发展较快,但腐蚀动力学的规律性不明显;浸泡后期,腐蚀发展稍慢,腐蚀动力学近似地遵循线性规律。     

铝箔交流腐蚀的阴极半周期间表面酸度变化与腐蚀产物膜的形成

建立了一个估算在盐酸溶液中交流电解腐蚀铝箔时阴极半周铝表面液层酸度变化和预测腐蚀膜沉积的数学模型。分析结果表明 :电极表面液层酸度仅取决于盐酸本体浓度 (C0 )、外加阴极电流密度 (iappl)和交流电频率 (f) ,如果腐蚀条件满足 C0iappl 587f(f 1 0 .4 ) 2 ,则Al3 就可能沉淀形成腐蚀产物膜。     

交流负半周对高纯铝在盐酸溶液中点蚀行为的影响

研究了阴极下限电位和阴极半周时间对高纯铝在２ｍｏｌ／Ｌ ＨＣｌ溶液中三角波动电位极化初期的伏安特性和表面形貌的影响,随极极下限电位的负移,阳极溶解电流快速减小,腐蚀箔表面蚀坑直么和密度明显降低;但在同一阴极下限电位时,随阴极半周时间的延长,阳极电流则缓慢降低。     

热加工对Fe—Mn—Si—Cr合金马氏体相变和SME的影响

本文采用电阻分析、Ｘ射线衍射和电子探针等方法,研究了热加工条件对Ｆｅ－Ｍｎ－Ｓｉ基合 金马氏体相变和形状记忆效应（ＳＭＥ）的影响。当合金在热拉并７５０℃退火后发现,正常退火条件 下的ｆcｃ　ｈｃｐ马氏体相变受到抑制,材料明显脆化,ＳＭＥ完全丧失。研究表明,这一热加工脆性 是由于合金中非平衡相的沉淀所致。材料重新加热到９３０℃以上,随着相重新溶解过程的完 成,上述热加工脆性得到消除,马氏体相变和ＳＭＥ也得到恢复。     

Characterization of black rust staining of unpassivated 55% Al–Zn alloy coatings. Effect of temperature, pH and wet storage

Wet storage staining is a phenomenon that occurs on both zinc coated and 55% Al–Zn coated steel sheets during shipment or storage in damp conditions. Whereas zinc coated sheets form white corrosion products, 55% Al–Zn coated steel sheets form black corrosion products. The effect of temperature, pH and wet storage on the occurrence of black rust staining of unpassivated Aluzink samples has been investigated in the laboratory in terms of corrosion product formation and composition. A characterization of corrosion products formed has been performed mainly based on scanning electron microscopy with X-ray microanalyses (SEM/EDS) for morphological and quantitative analyses and X-ray diffraction techniques (XRD) for crystalline phase identification. Black rust formation is strongly related to alkaline pH regions and is enhanced by the temperature. All black panels show the presence of Bayerite (Al(OH)₃), mainly formed on the aluminum rich dendrite branches and a basic zinc aluminum carbonate (Zn₆Al₂(OH)₁₆CO₃·4H₂O) formed in the zinc rich interdendritic alloy regions in contact with air. Blackening of Aluzink surfaces is connected to differences in optical properties of embedded metallic zinc and/or aluminum particles of different shape and size in the corrosion layer.     

LY11铝合金及H62黄铜的土壤腐蚀行为

用埋设试件的方法,在酸性,中性及碱性土壤中,研究了ＬＹ１１铝合金及Ｈ６２黄铜 经过１、３、５年３个试周期后的腐蚀特性。结果表明,ＬＹ１１铝合金在土壤中腐蚀主要表现为局部 腐蚀,Ｈ６２黄铜主要表现为脱锌腐旬,腐蚀程度主要取决于土壤类型及质地,在质地明显不均匀的碱 性土壤中腐蚀严重,而在质地较均匀的中性粘土及酸性粘土中腐蚀轻微。     

合金半钢轧辊在均整机上的应用

对比了用于Φ１００ｍ ｍ 自动轧管机组均整机的６０ＳｉＭｎＭｏ 钢和ＺＵＢ１４０ＣｒＭｏ 半钢轧辊使用情况。试验表明, ＺＵＢ１４０ＣｒＭｏ 半钢轧辊具有硬度落差小, 耐磨性好等优点, 是均整机轧辊的理想材料。     

Water Vapor and Oxygen Degradation Mechanisms in Organic Light Emitting Diodes

The degradation of organic light emitting diodes (OLEDs) due to the growth of dark spots can be attributed to the synergy of three external causes: dust particles deposited during the fabrication process, pollution by water vapor, and pollution by oxygen. On the basis of a set of new experiments performed on benchmark devices, we demonstrate that, for a given distribution of dust particles and a given concentration of the polluting agent, water is a thousand times more destructive than oxygen at room temperature. While the thermal diffusion of oxygen causes the oxidation of both the metal at the interface and the dye in the bulk of the device, water acts by an electrochemical process causing the delamination of the electrode.     

PIN/PAN聚合物基电解质膜的制备及性能

利用静电纺丝技术制备了聚吲哚/聚丙烯腈(PIN/PAN)聚合物基电解质膜,代替纸基铝空气电池中的纤维素纸(C-P),并应用于固态铝空气电池。探究了PIN含量对电解质膜离子电导率及吸液率的影响。采用SEM和FTIR对PIN/PAN聚合物基电解质膜表面形貌及化学组成进行分析。借助电化学工作站和电池测试系统,分析了电解质膜离子电导率及固态铝空气电池放电特性。结果表明,采用PIN/PAN聚合物基电解质膜可有效提升固态铝空气电池性能,在3 mA.cm_^-2、5 mA.cm_^-2、7 mA.cm_^-2电流密度下,放电时长比纸基铝空气电池分别提升了21%、27%、34%,且放电时长与电解质膜的吸液率及离子电导率相关。其中4%PIN/PAN聚合物基电解质膜离子电导率可达6.7×10_^-4 S.cm_^-1,同时对碱性溶液具有良好的吸附能力,吸液率最高可达496%,为纤维素纸的3.2倍。