黄懋容
,
殷定贞
,
曹玔
,
张玉苓
金属学报
<正> 在Co-Ga二元系中,β相的理想成分CoGa在室温的单相均匀范围为36.3—59.8at.-％Ga,它属于立方晶系的CsCl型结构,其点阵常数随Ga成分而变化,在接近理想成分的48at.-％Ga处有一最大值。在富Co端,为替代式固溶体。因为Co原子半径比Ga小,所以可以用原子半径...
关键词:
Co-Ga二元系
,
β-phase
,
positron annihilation
,
solid solution
赵飞
,
冯修吉
,
龙世宗
,
孙文华
,
王少阶
,
张才国
材料研究学报
对水泥矿物之一β-C_2S 的粉磨过程进行了摩擦化学研究,用X 射线微观应力测定法和正电子湮没技术(PAT)测定了粉磨过程中β-C_2S 晶格畸变和结构缺陷的变化,从形变的微观机制对测试结果进行了探讨。测定了不同粉磨时间样品的比表面积,粒径分布和水化放热速率,解释了不同大小颗粒水化活性差异的原因。
关键词:
粉磨
,
tribochemistry
,
microstress
,
positron annihilation
,
hydraulic activity
DENG Wen XIONG Liangyue LONG Qiwei Institute of Metal Research
,
International Centre for Materials Physics
,
Academia Sinica
,
Shenyang
,
China Associate Professor
,
Institute of Metal Research
,
Academia Sinica
,
Shenyang 110015
,
China
金属学报(英文版)
The recovery recrystallization of 3 deformed Ni-Cr-Co superalloys with different Co con- tents has been studied using positron annihilation technique and TEM.The alloys with low Co content have more defects occurred than ones with high Co content,and the former may be faster in dislocation recovery ...
关键词:
positron annihilation
,
null
,
null
,
null
DENG Wen XIONG Liangyue LONG Qiwei International Centre for Materials Physics
,
Institute of Metal Research
,
Academia Sinica
,
Shenyang
,
ChinaWANG Shuhe GUO Jianting Institute of Metal Research
,
Academia Sinica
,
Shenyang
,
China Institute of Metal Research
,
Academia Sinica
,
Shenyang 110015
,
China
金属学报(英文版)
The behuviour of B atoms added to mono-and poly-crystalline Ni_3AI alloys has been investi- gated hy positron annihilation technique(PA T).If the additive of B was less than 1.37 at-%, some of B atoms solid-solutioned interstitially into matrix and distorted the lattice,thus the lifetime (τ) of posi...
关键词:
Ni_3Al
,
null
,
null
,
null
PANG Dexing WANG Jingtang DING Bingzhe LI Zhixian Institute of Metal Research
,
Academia Sinica
,
Shenyang
,
China WANG Jingtang
,
Professor
,
Institute of Metal Research
,
Academia Sinica
,
Shenyang 110015
,
China
金属学报(英文版)
The glass transition in amorphous semi-conducting Se has been studied by DSC thermal ana- lysis,infrared absorption spectra and positron annihilation measurements.The results show that the glas transition seems to be reasonably explained from the viewpoints of MDS model and valence alternation pair ...
关键词:
amorphous Se
,
null
,
null
,
null
邓文
,
祝莹莹
,
周银娥
,
黄宇阳
,
曹名洲
,
熊良钺
稀有金属材料与工程
测量了Ti50Al50,Ti50Al48V2,Ti50Al48Ag2合金和充分退火的Ti,Al,Ag,V金属的正电子寿命谱,利用正电子寿命参数分别计算了合金基体和缺陷态的自由电子密度.TiAl合金的脆性与其基体和晶界缺陷处的自由电子密度较低有关.在富Ti的TiAl合金中加入V,V原子比Al和Ti原子...
关键词:
TiAl合金
,
电子密度
,
缺陷
,
正电子湮没
刘文斌
,
李书瑞
,
罗毅
材料热处理学报
利用离子辐照模拟中子辐照效应技术对AP1000安全壳用钢SA738Gr.B进行了高能氢离子辐照,采用透射电镜、聚焦离子束原位技术和正电子湮没技术,研究SA738Gr.B钢(两种热处理状态:淬火+回火态、淬火+回火+消除应力热处理(SR)态)经过高能氢离子辐照的辐照损伤行为.结果表明,在比较明显的辐照...
关键词:
SA738Gr.B
,
消除应力热处理
,
离子辐照
,
正电子湮没
