闫云飞
,
张力
,
李丽仙
,
唐强
无机材料学报
doi:10.3724/SP.J.1077.2011.01233
燃料电池对其理想燃料氢气的纯度要求极高, 如何低成本、大规模制取高纯氢气已成为燃料电池技术实现工业化的一个关键问题和研究热点. 近年发展起来的兼具催化与分离双重功能的膜催化反应技术是实现制取高纯氢气的一个有效途径. 本文结合膜催化反应领域的最新进展, 综述了膜催化反应器的优点、组成、类型; 介绍了无机膜材料的优点、分类及制备技术; 详细综述了透氧膜催化反应器、透氢膜催化反应器及双膜催化反应器在制氢过程中的研究进展和应用, 指出了膜催化反应制氢技术在工业化发展过程中存在的问题及应用前景.
关键词:
膜
,
reactor
,
catalytic
,
separation
,
hydrogen
,
review
黄卫东
,
左禹
,
魏龙
,
王文华
腐蚀学报（英文）
测量了非晶态NiCrFeSiB合金电化学渗氢前后的正电子寿命谱,探索氢与非晶态结构中的空位型缺陷的相互作用.合金中主要存在自由体积和空位团两种类型的缺陷,低电流渗氢对缺陷结构无明显影响,高电流渗氢导致空位团型缺陷浓度升高,但不稳定,当氢逸出后又会分解,合金结构恢复到稳定状态.
关键词:
非晶态合金
,
hydrogen
,
positron
李永德
,
徐娜
,
时军波
,
马虹
材料热处理学报
采用了两种不同的充氢方法(浸泡充氢和高压气相热充氢)研究了氢对断口上颗粒状亮区(Granular Bright Facet/GBF)尺寸的影响.研究表明,浸泡充氢并没有改变“GBF”的颗粒状特征,高压气相热充氢使得“GBF”的颗粒状特征变浅甚至消失.不论哪种充氢方法,充氢均使得“GBF”在较低的外加载荷下出现,且与充氢前相比“GBF”尺寸明显增加.电化学充氢没有改变疲劳寿命与(SGBF)1/2/(Sinc)1/2之间的关系,但是高压气相热充氢后疲劳寿命与(SGBF)1/2/(Sinc)1/2之间的关系有显著变化.
关键词:
超高周疲劳
,
夹杂物
,
GBF
,
氢
赵坤
,
何方
,
黄振
,
李海滨
,
赵增立
工程热物理学报
采用燃烧法制备了钙钛矿型氧化物LaFe1-xNixO3(x=0.1、0.15、0.2、0.3)用于甲烷化学链水蒸气重整过程,通过两步分别获得合成气(H2+CO)和H2.在固定床反应装置上考察甲烷与载氧体的部分氧化过程以及还原态的载氧体与水蒸气的氧化反应过程.结果表明,CH4与LaFe1-xNixOa载氧体恒温反应的最佳温度为800～850°C,反应的前10min甲烷与载氧体以部分氧化为主,主要生成合成气H2和CO. 10 min之后反应以CH4裂解为主.水蒸气氧化阶段,Ni的掺杂量为x=0.1和x=0.3时的H2浓度最高,分别为7.2％和8.3％.
关键词:
LaFe1-xNixO3
,
钙钛矿
,
晶格氧
,
合成气
,
氢气
谢莎
,
邓爱红
,
王康
,
王玲
,
李悦
,
王勇
,
汪渊
材料研究学报
用磁控溅射方法制备纳米多晶钨膜,采用x射线衍射(XRD),扫描电子显微镜(SEM),弹性反冲探测(ERD)和慢正电子束分析(SPBA)等手段研究了在高能He+和H+依次对其辐照后He相关缺陷对H滞留的影响.结果表明,注He+钨膜在退火后从β型钨向α型钨转变；钨膜中的He含量随着退火温度的提高而减少,在873 K退火加剧钨膜中He原子的释放,且造成钨膜空位型缺陷的增加和结构无序度的提高；钨膜中的H滞留总量随着He滞留总量的减少略有下降.
关键词:
金属材料
,
磁控溅射钨膜
,
慢正电子束分析
,
H
,
He
C.H. Zhou
,
K. Yang
,
D.F. Li and Y.X. Lu(Liaoning Key Lab for Hydrogen and Materials
,
Institute of Metal Research
,
The Chinese Academy of Sciences
,
Shenyang 110015
,
China)
金属学报(英文版)
The effect of hydrogen on the deformation behavior of three typical kinds of titanium alloys, pure Ti, Ti-6Al-4V and Ti-15V-3Cr-3Al-3Sn (Ti-15-3), at high temperature has been investigated by short time creep test. XRD and TEM techniques are used to examine the changes in their microstructures. The results show that deformation rutes of pure Ti and Ti-6Al-4V alloy can be greatly increased by hydorgen charping due to an increase of β phase volume in their microstructures. β→α transformation is found to occur in unchanged Ti-15-3 alloy during creep process. The addition of 0. 73wt% hydrogen can completely inhibit the deformation-induced transformation and strengthen the metastable β phase in Ti-15-3 alloy, resulting in a dramatic decrease of deformation rate of this alloy at 700° C.
关键词:
titanium
,
null
,
null
C.H. Zhou
,
K. Yang and Y.X. Lu (Liaoning Key Lab for Hydrogen and Materich
,
Institute of Metal Research
,
The Chinese Academy of Sciences
,
Shenyan 110015
,
China)
金属学报(英文版)
In order to alleviate the severe interface reaction, which is likely to occur during the fabrication of continuous SiC fiber reinforced titanium matrix composite, hydrogen was temporarily introduced in the fabrication to lower the consolidation temperature of Ti/SiC composites in the present work. Effects of different fabrication conditions, with or without hydrogen, on the bonding state and the matrix microstructure were investigated. In-situ hydrogenation method was found to larpely improve the interface bonding of the composite, and full consolidation could be achieved at 750 or even 700° C more than 100°C lower than the normal fabrication temperature of Ti/SiC composite, which consequently reduced the interfacial reaction layer between Ti matrix and SiC fiber. Different hydrogenation condition led to different matrix microstructure. In order to avoid the embrittling effect of residual hydrogen on the composite,Ti/SiC composite needs to be held in vacuum at the fabrication temperature for longer time after consolidation.
关键词:
Ti/SiC composite
,
null
,
null
