Zhongming LI
,
Mingbo YANG
,
Rui HUANG
,
Ai LU
,
Jianmin FENG
材料科学技术（英文）
In-situ composites based on dispersed poly (ethylene terephthalate) (PET) or polyamide (PA), and continuous polyethylene (PE) were prepared through a single screw extruder of Haake rheometer system with a rod-die relatively small in diameter. The extrudate was drawn at a drawing ratio of 3.1, and then quickly cooled in cold water. The specimens were obtained by injection molding at processing temperatures less than 190°C, far below the melting temperature of PET (265°C) and PA (230°C), which can maintain the solid state of PET and PA microfiber phase in the composites. Morphological observation with scanning electron microscopy (SEM) indicated that PET and PA can more or less form in-situ microfibers at compositions studied (0~20 wt pct PET or PA), and especially, PET and PA were almost deformed into fibers at the concentration of 15 wt pct. Tensile strength and modulus of the blends reinforced by PET or PA microfibers showed to be increased from the tensile test results. The most noticeable improvement of the tensile properties occurred at 15 wt pct of PET in PET/PE system, corresponding to the highest microfiber content, where the tensile strength reached 32.5 MPa, whereas only 19.5 Mpa for the pure PE.
关键词:
In-situ composite
,
null
,
null
,
null
Liang ZHEN Yuexian CUI Dezhuang YANG Department of Materials Science
,
Harbin Institute of Technology
,
Harbin
,
150006
,
ChinaShenglong DAI Guifu YU Beijing Institute of Aeronautical Materials
,
Beijing 100095
,
China
材料科学技术（英文）
The formation of precipitation free zone (PFZ) and its effect in a RSP AI-Li alloy has been studied. The results show that PFZ is easy to form when aged at 190℃,but there is no equilibrium phase on grain boundaries.The growth of PFZ in the alloy is different from that in conventional AI-Li alloys, The effect of PFZ is of great importance because of its large volume fraction in the alloy.It offsets the beneficial effect of RSP,and is thought to be an important factor that leads to the poor toughness and low ductility of RSP AI-Li alloy sheet.
关键词:
precipitation free zone
,
null
,
null
,
null
ZHANG Qianxiang
,
University of Science and Technologys Beijing
,
Beijing
,
China
金属学报(英文版)
Activities and activity coefficients of Al in solid Cu-AI alloys have been determined by meansof solid electorlyte galvanic cells Al(a_1 , in alloy), Al_2O_3 ZrO_2·Y_2O_3 Ni, NiOand Al(a_1, in alloy), Al_2O_3 Na, βAl_2O_3 Al(a_2 , in alloy), Al_2O_3
关键词:
Cu-Al alloy
,
null
,
null
,
null
,
null
洪智亮
,
成来飞
,
鲁琳静
,
张立同
,
王一光
无机材料学报
doi:10.3724/SP.J.1077.2010.00186
采用溶胶-凝胶法制得三种镥硅酸盐体系粉体材料. 以氧化物的摩尔比来表示此三种粉体, 分别为：Lu2O3·SiO2、Lu2O3·2SiO2和Lu2O3·2.26SiO2. 在1400℃、50%H2O-50%O2静态常压气氛下, 研究了它们的耐水蒸气腐蚀性能.以单位面积重量变化率表征材料的耐水蒸气腐蚀性能, 结合X射线衍射（XRD）、傅里叶红外光谱（FTIR）和扫描电镜能谱分析（SEMEDS）等分析手段, 揭示了镥硅酸盐体系在高温水蒸气环境中的腐蚀机制和反应机理. 结果表明：三种原始粉体主要物相依次为：Lu2SiO5+Lu2Si2O7、 Lu2Si2O7+SiO2和Lu2Si2O7+SiO2. 在水蒸气作用下, Lu2SiO5相与Al2O3反应生成新相Lu3Al5O12, 而Lu2Si2O7相并未受到水蒸气的作用而发生任何反应, 表现出优异的化学稳定性.
关键词:
Lu2SiO5
,
Lu2Si2O7
,
environmental barrier coating (EBC)
,
water vapor corrosion
洪智亮
,
成来飞
,
鲁琳静
,
张立同
,
王一光
无机材料学报
doi:10.3724/SP.J.1077.2010.00186
采用溶胶-凝胶法制得三种镥硅酸盐体系粉体材料.以氧化物的摩尔比来表示此三种粉体,分别为:Lu_2O_3·SiO_2、Lu_2O_3·2SiO_2和Lu_2O_3·2.26SiO_2.在1400℃、50%H_2O-50%O_2静态常压气氛下,研究了它们的耐水蒸气腐蚀性能.以单位面积重量变化率表征材料的耐水蒸气腐蚀性能,结合X射线衍射(XRD)、傅里叶红外光谱(FTIR)和扫描电镜能谱分析(SEM-EDS)等分析手段,揭示了镥硅酸盐体系在高温水蒸气环境中的腐蚀机制和反应机理.结果表明:三种原始粉体主要物相依次为:Lu_2SiO_5+Lu_2Si_2O_7、Lu_2Si_2O_7+SiO_2和Lu_2Si_2o_7+SiO_2.在水蒸气作用下,Lu_2SiO_5相与Al_2O_3反应生成新相Lu_3Al_5O_(12)而Lu_2Si_2O_7相并未受到水蒸气的作用而发生任何反应,表现出优异的化学稳定性.
关键词:
Lu_2SiO_5
,
Lu_2Si_2O_7
,
环境障碍涂层
,
水蒸气腐蚀
马畅
,
李晓东
,
董宇
,
刘绍宏
,
朱琦
,
李继光
,
霍地
,
孙旭东
中国稀土学报
doi:10.11785/S1000-4343.20130411
以Lu(NO3)3和尿素为原料,采用均相沉淀法合成镥盐前驱体,研究Lu3+浓度、尿素/Lu3+摩尔比R对前驱体形貌的影响.结果表明,在反应温度为95℃时,低Lu3+浓度有利于单分散球形粉体的合成,并且适当的调整R值可将单分散球形颗粒尺寸控制在180 ～ 270 nm之间.在此基础之上,研究Eu3+掺杂Lu2O3单分散球形荧光粉体的合成,探讨了Eu3+的掺杂量(1％,3％,5％,7％,9％(原子分数))及煅烧温度(600～ 1200℃)对颗粒形貌及其荧光性能的影响.结果表明,Eu3+的掺杂使所得(Lu,Eu)盐前驱体颗粒尺寸远小于单纯的Lu盐前驱体,且Eu含量对荧光粉的荧光强度有着显著的影响,荧光淬灭浓度为5％.在考察的煅烧温度范围内,荧光粉的荧光强度随煅烧温度的提升而增强.
关键词:
Lu2O3
,
Eu3+
,
均相沉淀
,
单分散球形
,
前驱体
,
荧光性能
,
稀土
Journal of Magnetism and Magnetic Materials
Magnetization curves of the ternary tetragonal compound Lu2Fe14C were measured in an extracting-sample magnetometer in the temperature range from 1.5 to 300 K. The temperature dependence of the magnetic properties of Lu2Fe14C is discussed.
关键词:
anisotropy
王宝峰
,
胡恩安
腐蚀学报（英文）
低伤害、耐高温缓蚀剂AI-811是以咪唑啉季铵盐为主 体，并复合含S、含酮、含酰胺的混合成分，适用于HCl、盐酸/氢氟酸（HCl/HF）及醋酸等 有机混合酸液体系.其主要特点是高温缓蚀效果好，可预防或大大降低酸液对低渗储层的伤 害，使用浓度低，气味极小，与酸液中的其他添加剂配伍性好，适用性强，与缓蚀增效剂AI -800协同使用可在高达190℃下显示独特的优良缓蚀性能.
用CC-10-S高温高压动态腐蚀实验仪对AI-811的高温缓蚀性能进行了评价.结果表明：AI-811 及其AI-800在高温、高压、动态条件下对各种酸溶液具有很好的缓蚀效果，可使N-80油管 钢在高达190℃的储层温度下腐蚀速度大幅度降低，平均腐蚀速度<100 g/m2·h.
关键词:
酸化缓蚀剂
,
high temperature
,
corrosion
王宝峰
,
胡恩安
腐蚀学报（英文）
doi:10.3969/j.issn.1002-6495.2001.05.011
低伤害、耐高温缓蚀剂AI-811是以咪唑啉季铵盐为主体,并复合含S、含酮、含酰胺的混合成分,适用于HCl、盐酸/氢氟酸(HCI/HF)及醋酸等有机混合酸液体系.其主要特点是高温缓蚀效果好,可预防或大大降低酸液对低渗储层的伤害,使用浓度低,气味极小,与酸液中的其他添加剂配伍性好,适用性强,与缓蚀增效剂AI-800协同使用可在高达190℃下显示独特的优良缓蚀性能.用CC-10-S高温高压动态腐蚀实验仪对AI-811的高温缓蚀性能进行了评价.结果表明:AI-811及其AI-800在高温、高压、动态条件下对各种酸溶液具有很好的缓蚀效果,可使N-80油管钢在高达190℃的储层温度下腐蚀速度大幅度降低,平均腐蚀速度＜100 g/m2@h.
关键词:
酸化缓蚀剂
,
腐蚀
,
高温
