徐淑华
,
关若男
,
于赢大
,
李日升
腐蚀学报（英文）
利用电子显微镜中的电子束对铜超微粒子进行了连续地照射和跟踪观察,结果表明电子束使Cu与镜筒中的低氧压气氛发生了反应,电子束的辐照使纳米量级的Cu粒子发生了氧化并被消耗,首先生成一种类非晶膜,然后生成Cu的晶态氧化物,新生成的Cu的晶态氧化物,在电子束的进一步照射下,又发生了还原反应,不断地还原为铜
关键词:
铜超微粒子
,
oxidation
,
reduction
,
electron beam irradiation
,
amorphouslike layer
杨学民
,
王大光
,
宣德茂
金属学报
在1723K进行了CO还原CaO—SiO_2-Fe_(t)O三元渣系的研究根据CO_2红外分析仪测定的出口气体中的CO_2浓度变化,计算了炉渣的表观还原速度常数K_(a)结果表明,K_(a)随炉渣中Fe_1O量增加呈抛物线变化;当炉渣碱度R<1.0,Fe_(t)O为50％和R为1.5,Fe_(t)O为70％时,K_(a)分别出现最小值用炉渣规则溶液模型可计算1723K时的CaO-SiO_2-Fe_tO三元渣系的Fe_1O活度值a_(Fe_1O)。
关键词:
CaO—SiO_2-Fe_1O三元渣系
,
reduction
,
activity
,
reduction rate
杜鹤桂
,
邹安华
金属学报
研究了高炉冶炼钒钛磁铁矿时Ti(C,N)的生成规律以及高钛渣中MnO对TiO_2的影响。结果表明,高钛渣中MnO对抑制TiO_2还原在渣-焦处作用不大,而主要在渣-铁处,渣中含MnO4％左右,碱度0.6—1.2能显著抑制Ti(C,N)的生成,(MnO)在一定条件下还能显著抑制(SiO_2)的还原,加速脱硫反应。
关键词:
高炉冶炼
,
TiO_2
,
reduction
,
MnO
,
slag
Z.L. Mi
,
D. Tang
金属学报(英文版)
he influence of cold rolling reduction on microstructure and mechanical properties of the TWIP (ttwinning induced plasticity) steel was investigated. The results indicated that the steel had better comprehensive mechanical properties when cold rolling reduction was about 65.0% and the annealing temperature was 1000℃. The tensile strength of the steel is about 640MPa and the yield strength is higher than 255MPa, while the elongation is above 82%. The microstructure is composed of austenitic matrix and annealing twins at room temperature, at the same time, a significant amount of annealing twins and stacking faults are observed by transmission electron microscopy (TEM). Mechanical twins play a dominant role during deformation, and result in excellent mechanical properties.
关键词:
cold rolling reduction
,
rolling
,
reduction
,
annealing
,
tempera
曹华珍
,
宁伟
,
姜志鹏
,
郑国渠
电镀与涂饰
以钛阳极氧化制备的TiO2纳米管(TNTs)阵列为载体,采用脉冲电沉积法将Cu2O沉积到TNTs的管壁上,制备了Cu2O/TNTs电极.采用扫描电镜(SEM)、透射电镜(TEM)以及X射线光电子能谱(XPs)对电极的形貌以及沉积物价态进行了表征.通过循环伏安、光电流-时间曲线测试,研究了沉积电位以及沉积电量对电极光电催化性能的影响.结果表明:脉冲电沉积的沉积物为Cu2O纳米颗粒.制备的Cu2O/TNTs电极光电活性及稳定性明显优于Cu2O/Ti电极.电位-0.5 V(相对于饱和甘汞电极)下脉冲沉积60 mC制备的电极对CO2还原具有较高的光电催化活性.在装有100 mL 0.1 mol/L NaHCO3溶液的自制密闭反应器中利用Cu2O/TNTs电极光电催化还原CO2,合成的产物主要为甲醇,还原5h后甲醇含量达到6.05 mg/L.
关键词:
二氧化钛
,
阳极氧化
,
纳米管阵列
,
氧化亚铜
,
脉冲电沉积
,
二氧化碳
,
还原
,
光电催化
LAN Yaozhong
,
Panzhihua Institute of Iron and Steel Research
,
Sichuan
,
ChinaZHU Zuze
,
LIU Chunpeng
,
Kunming Institute of Technology
,
Kunming
,
China LAN Yaozhong
,
Panzhihua Institute of Iron and Steel Research
,
Dukou 617000
,
Sichuan
,
China
金属学报(英文版)
The process of Luda ilmenite smelting by plasma furnace has been studied by means of self-designed plasma torch. The prereduced Luda ilmenite was melted satisfactorily in plasma furnace to produce Ti enriched slag containing 90-98% TiO_2.
关键词:
Luda ilmenite
,
null
,
null
,
null
