SUN Dongsheng LI Fengzhao Shandong Polytechnic University
,
Jinan
,
Laboratory of Atomic Imaging of Solids
,
Institute of Metal Research
,
Academia Sinica
,
Shenyang
,
ChinaDAI Jiyan LI Douxing Laboratory of Atomic Imaging of Solids
,
Institute of Metal Research
,
Academia Sinica
,
Shenyang
,
China associate professor
,
Institute of Materials Engineering
,
Shandong Polytechnic University
,
Jinan 250014
,
China
金属学报(英文版)
Observation under high resolution electron microscope shows that the continuous bombing of high speed ions produces a great amount of vacant site defects.The assembly of vacancies forms vacant dish,and the collapase of vacant dish forms stacking fault tetrahedrons and oth- er crystal defects.The interfaces between phase ε(Fe_(2-3)N)and phase γ'(Fe_4N)are smooth, straight and coherent,and they have the orientation relationships of(11)//(0001)and [110]/[110] .
关键词:
crystal defect
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null
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null
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ZHANG Lin
,
LIU Yihua Shandong University
,
Jinan
,
China WANG Hao Dongnan University
,
Nanjing
,
China engineer
,
Department of Physics
,
Shandong University
,
Jinan 250100
,
China
金属学报(英文版)
Metal Fe/Pd compositionally modulated films(CMFs) were prepared by vapour depo- sition from two sources onto glass substrate under vacuum.The modulation and crystal structures of the films were examined by X-ray diffraction.The magnetic properties were determined by vibrating sample magnetometer.The Pd layers in the Fe/Pd CMFs are of fcc structure,and the Fe layer structure transits from bcc into amorphous,state with decreasing thickness of Fe layer.The dependence of specific saturation magnetization on thickness of Fe layers has also been discussed.
关键词:
compositionally modulated films
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null
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LIU Yihua Shandong University
,
Jinan
,
ChinaYA NG Linqian Huaqiao University
,
Quanzhou
,
Fujian
,
China LIU Yihua Associate Professor
,
Dept.of Physics
,
Shandong University
,
Jinan 250100
,
China
金属学报(英文版)
The amorphous CoZr soft magnetic films with superior properties were prepared by radio-frequency sputtering under pressure of 0.5Pa Ar.The saturation magnetization of the amorphous CoZr films with relation to the Zr content and temperature was investigated.The amorphous CoZr films composed of different constituents obey the Bloch T~(3/2)-low in a wide range of temperatures.The number of electrons transferred from each Zr atom to 3d energy band of Co calculated by the rigid band model is about 2.27.
关键词:
amorphous alloy
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null
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null
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LUO Yang JI Qigen ZHANG Ning SU Xiujin Central Iron and Steel Research Institute
,
Ministry of Metallurgical Industry
,
Beijing
,
ChinaSUN Daliang Shandong University
,
Jinan
,
China senior engineer
,
Department of Precious Alloys
,
Central Iron and Steel Research Institute
,
Beijing
,
China
金属学报(英文版)
Based on the observation of temperature variation of both domain structure and magnetic con- trast.the thermal demagnetization and randomness of domain nucleation was discussed.
关键词:
domain structure
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null
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null
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SUN Dongsheng LI Fengzhao ZHANG Gang Shandong Polytechnic University
,
Jinan
,
China Lecturer
,
Centre of Materials Testing and Analysis
,
Shandong Polytechnic University
,
Jinan 250014
,
China
金属学报(英文版)
Cryogenic strength,ductility and toughness of AI-Li alloy 8090 were found to be superior to those at ambient temperature,and up to optima at about 20 K.Different aging regimes may only influence on its cryogenic yield strength and elongation.
关键词:
Al-Li alloy
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null
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null
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LIU Yongkun Southwestern Institute of Technology and Engineering
,
Chongqing
,
ChinaYANG Shihao Shandong Polytechnical University
,
Jinan
,
China
金属学报(英文版)
Using liquid quenching technique,the change of growth mode of graphite in cast iron melt was analysed.Based on the interface structure theory of crystal growth,the concept of multiplication of spiral growth steps was advanced and two basic multiplication models were given.It was proposed that multiplication of spiral steps is responsible for the change of growth mode of graphite in cast iron melt.The modifying elements such as Ce promote multiplication of spiral steps,which is regarded as the core of modification.Origination of screw dislocation and branch of the sector blocks in radius direction,both of which are essential to spheroidization of graphite in the melt,are caused by multiplication of spiral steps:and so is thickening of graphite plates.
关键词:
graphite
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null
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null
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null
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ZOU Zengda WANG Yong REN Dengyi Shandong Polytechnic University
,
Jinan
,
China
金属学报(英文版)
The structural change in heat affected zone(HAZ)and its influence on properties of welded white cast iron have been investigated by means of thermal cycle simulation technique.The structure of the white cast iron at peak temperature 800℃ was examined as cementite in pearlitic matrix,of which the hardness and impact toughness are the lowest,while the struc- ture after cyclic heating at high peak temperature is mainly cementite together with twin martensite,of which the hardness and impact toughness are rather higher.The phase bounda- ries in the structure of low hardness are smooth and regular as well as with fine precipitates. Both the cleavage and interphase fracture were revealed in the structure of low hardness,while the transgranular fracture was found in those areas of higher hardness.
关键词:
white cast iron
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null
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BI Siyun MA Xiaoding SONG Ruitian MEI Liangmo ZHAO Jiangao GUO Yicheng Shandong University
,
Jinan
,
China
金属学报(英文版)
Metallic Fe/Cu superlattice films on glass substrates were prepared by a dc-magnetion sputtering system.The modulation behaviors and the crystal structures of the films were ex- amined by X-ray diffraction and transmission electron microscopy(TEM)respectively. Their magnetic properties were studied by means of ferromagnetic resonnance spectrometer and the vibrating sample magnetometer.The results show that there exists a strong magnetic coupling between the neighbouring Fe layers and it is the coupling that affectes the magnetic properties of these superlattice films.
关键词:
superlattice
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null
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