Y. Wu
,
C.S. He
,
X. Zhao
,
null
,
null
金属学报(英文版)
Effects of magnetic field strength on the evolution of recrystallization microstructure and recrystallization texture in cold-rolled interstitial-free steel were investigated after annealing at 660°C in a magnetic field up to 12T. Magnetic annealing was found to retard the recrystallization and induce the recrystallized grains elongated along the magnetic field direction. An interesting phenomenon is that the magnetic field shows the strongest effect at 1T.
关键词:
Magnetic annealing
,
annealing
,
Recrystallization
,
Tex
Y. D. Liu
,
G. Wang
,
C.S. He
,
Y.D. Whng and J.Z. Xu (Department of Materials Science and Engineering
,
Northeastern University
,
Shenyang 110006
,
China)
金属学报(英文版)
In view of being difficult to find a non-oriented multilayer specimen, the precise defocusing correction become a particular obstacle of quantitative texture analyszs of the multzlayer. A new method is employed in this paper for comcting the eoperzment data. And a theoretical calculation for the defocus curre is proposed thinking about both thc dtherent film thickness and the penetration depth of the incident beam in the films. A critical value jor the defocusing cormction in the film is alsi cinsidered. This new tcchnique is applied to the Zn-Cu multilayer for which the quantitative texture analysis is completed by the modified maxitnum entropy tnethod.
关键词:
multilayer
,
null
,
null
向鑫陈长安刘柯钊罗丽珠刘婷婷王小英
金属学报
doi:DOI:10.3724/SP.J.1037.2009.00590
用离子注入技术实现了Al表面C元素的掺杂, 并利用XPS, XRD, TEM和SEM研究了C掺杂对Al中离子
注入He行为的影响. 结果表明, 掺杂的C在Al表面形成了Al4C3, 随着C掺杂量的增加, Al表面组织的择优取向
和晶胞体积发生改变, 从而影响了Al中的He离子注入行为. 预先掺杂的C对He离子注入Al表面的鼓泡行为有重
要影响, 其影响程度与掺杂剂量有关. 小剂量C掺杂后, 能有效抑制鼓泡的长大, 并使Al表面鼓泡均匀分布; 更高
剂量C掺杂后, C对表面鼓泡的抑制作用减弱, 甚至加剧He离子的辐照损伤, Al表面出现孔洞和剥落现象. 掺杂的
C对Al基体的微观结构也有很大影响.
关键词:
Al
,
C doping
,
He behavior
,
blistering
,
microstructure
向鑫
,
陈长安
,
刘柯钊
,
罗丽珠
,
刘婷婷
,
王小英
金属学报
doi:10.3724/SP.J.1037.2009.00590
用离子注入技术实现了Al表面C元素的掺杂,并利用XPS,XRD,TEM和SEM研究了C掺杂对Al中离子注入He行为的影响.结果表明,掺杂的C在Al表面形成了Al_4C_3,随着C掺杂量的增加,Al表面组织的择优取向和晶胞体积发生改变,从而影响了Al中的He离子注入行为,预先掺杂的C对He离子注入Al表面的鼓泡行为有重要影响,其影响程度与掺杂剂量有关,小剂量C掺杂后,能有效抑制鼓泡的长大,并使Al表面鼓泡均匀分布;更高剂量C掺杂后,C对表面鼓泡的抑制作用减弱,甚至加剧He离子的辐照损伤,Al表面出现孔洞和剥落现象,掺杂的C对Al基体的微观结构也有很大影响,
关键词:
Al
,
C掺杂
,
He行为
,
鼓泡
,
微观结构
胡义华
,
刘美希
,
陈丽
,
王小涓
,
储焰南
,
曹德兆
量子电子学报
doi:10.3969/j.issn.1007-5461.2001.04.008
本文在流动余辉装置上,研究了亚稳态He(23S)原子与N2H4分子碰撞传能,观察到了激发态产物NH(A3II→X3∑+)、NH(c1II→a1△)、NH2(A2A1→X2B1)的发射光谱,由相对光谱强度求得了形成各产物的通道比;分析NH(A3II,v＇=0)的转动分辨谱的结果表明,v＇=0能级上的转动布居是"双模”分布,激发态产物NH(A)、NH2(A)的形成机理可能是: He(23S)+N2H4→N2H4*→NH(A)+NH2(A)+H.
关键词:
碰撞传能
,
化学发光
,
NH(A3Ⅱ)的发射光谱
向鑫
,
陈长安
,
蒋春丽
稀有金属材料与工程
用离子注入技术实现了Al表面Fe、C元素的掺杂,并用XRD研究Fe、C掺杂对He离子注入Al表面晶格畸变的影响.结果发现,预先掺杂的Fe、C在Al表面的晶格畸变中扮演重要角色,且影响程度与掺杂剂量有关.随着预先掺杂Fe剂量的增大,Al表面晶格畸变量先减小后增加,表明小剂量的Fe掺杂有助于降低He离子注入引起的晶格畸变.C掺杂后能进一步降低预先掺杂Fe引起的晶格畸变,降低程度随C剂量的增加而增加.可见,小剂量的Fe和高剂量的C共掺杂能有效降低He离子注入后Al表面的品格畸变.
关键词:
Al
,
XRD
,
Fe、C掺杂
,
晶格畸变
陈树东
,
项建明
,
王晓翠
,
洪笑
硅酸盐通报
以Ca(OH)2、SiO2、Fe2O3、Al2O3化学纯为原料,分别掺入不同质量分数的Ba(OH)2制备不同矿物相组成的熟料相,运用化学分析、XRD、SEM、水化热测试方法,研究掺Ba(OH)2后熟料相中硅酸三钙-硅酸二钙(C3S-C2S)混合相组成、晶型、新相生成的变化规律.结果表明:Ba(OH)2一定程度上削弱C3S形成,且稳定β-C2S形成效应明显,矿物相体系中α'-C2S、α-C2S量减少并转换为β-C2S,掺量大于2.5％后有新相Ba0.48 Ca1.52SiO4形成;Ba(OH)2掺入促使矿物相中C2S相明显增多,晶粒整体尺寸变小,边界变圆润;随Ba(OH)2掺量递增,熟料样的水化速率呈持续减小的趋势变化.
关键词:
C3S相
,
β-C2S
,
水化速率
,
水化
ZHANG Lei WANG Peixuan TAO Rong MA Ruzhang ZHANG Guoguang University of Science and Technology Beijing
,
Beijing
,
China professor
,
Department of Materials Physics.University of Science and Technology Beijing.Beijing 100083
,
China
金属学报(英文版)
Nucleation and growth of He bubbles at different annealing temperatures T≤1023 K in stain- less steels HR-2 and SS321,implanted with He~+(40-70 keV.1×10~(16)-6× 10~(17) He~+/cm~2),were ohserved under TEM.T=0.45T_m seems to be a transition temperature.The He bubbles continue mainly their nucleation at 0.3T_m< T<0.45T_m,and grow predominantly at T≥0.45T_m,due probably to migration and coalescence by surface diffusion of metal atoms around the bubbles.The apparent activation energies for the growth are found to he 0.41 and 0.31 eV for HR-2 and SS321 respectively.The bubble density in HR-2 is greater than that in SS321 within whole measuring temperature range,and the onset temperature of rapid swelling is also higher.It is believed that the resistance of HR-2 to He is superior to that fo SS321.
关键词:
stainless steel
,
null
,
null
,
null
,
null
