mechanical properties of thin films

... well-established knowledge of the electrical and optical properties of GaSe thin films, in this paper, we report the results on electrical and optical measurements of amorphous thin films of GaSe nanorods ... diameter of the nanorods varies from 140 to 180 nm, and the length is of several hundreds of nanometers Figure presents the temperature dependence of the dc conductivity of thin films of a- GaxSe100-x ... field of micro/optoelectronics Significant research efforts have been focused to the study of the electrical and optical properties of this compound in thin film formation Since the optimization of...

Ngày tải lên: 21/06/2014, 17:20

... and coefficients of thermal expansion of amorphous Cu-Zr thin films - 162 7.1 Measurement of Young’s modulus of amorphous Cu-Zr thin films - 162 7.1.1 Analytical model ... coefficients of thermal expansion of amorphous (CTE) Cu-Zr thin films It has been proposed that the elastic moduli of metallic glasses correlate with their thermal and mechanical properties, such ... review of the basic concepts and analyses of the mechanical properties of materials, as well as the elements of beam mechanics used in this project Chapter describes the fabrication xiv processes of...

Ngày tải lên: 11/09/2015, 09:16

... Chapter Effects of NH3 Plasma Treatment on Mechanical Properties of Porous Low-k Thin Films 71 4.1 Effects of NH3 Plasma Treatment on the Mechanical Properties of ZIRKON LK2200 ... plasma treatment of certain porous low-k films can improve the mechanical properties of the films significantly NH3 plasma treatment enhances the mechanical properties of porous low-k films by changing ... low-k films to improve their mechanical properties We conjecture that the nitridation of these films should help to enhance the mechanical strength of the films due to the incorporation of stronger...

Ngày tải lên: 09/10/2015, 11:18

... the mechanical properties of TCO films and most of them were focused on n-type TCOs Report on mechanical properties of p-type TCOs is rare, if any In particular, no report on the mechanical properties ... 2.4 MECHANICAL PROPERTIES OF TCOS 2.4 Mechanical Properties of TCOs The mechanical properties such as hardness, elastic modulus, internal stress or adhesion of transparent conductive oxide films ... 5.7 Growth rate versus inverse of substrate temperature of the films 95 5.8 Effect of substrate temperature on film mechanical properties 96 5.9 XRD patterns of films prepared at different...

Ngày tải lên: 27/11/2015, 12:13

... and 2.8(f) These may be thought of as the absence of a plane of atoms (intrinsic stacking faults) or the insertion of rows of atoms that disturb the arrangement of atoms (extrinsic stacking faults) ... example of volume defects is presented in Fig 2.9 This shows MnS inclusions in an A707 steel Another example of a volume defect is presented in Fig 1.16(d) This shows evidence of $1–2 vol % of porosity ... approximately 0.3–0.5 of the melting temperature in degrees Kelvin Since the evolution of microstructure is often controlled by diffusion processes, a brief introduction to elementary aspects of diffusion...

Ngày tải lên: 23/12/2013, 00:15

... of the mechanical properties of materials It is not intended to be a comprehensive review of all the different aspects of mechanical properties; such a task would be beyond the capabilities of ... Inc 1 Overview of Crystal/Defect Structure and Mechanical Properties and Behavior 1.1 INTRODUCTION The mechanical behavior of materials describes the response of materials to mechanical loads ... macroscopic level of understanding of structure [Figs 16(a)–(d)] They are often unaware of the atomic and microstructural constituents that can affect the mechanical behavior of materials and of the role...

Ngày tải lên: 23/12/2013, 00:15

... soaking, modulus of elasticity (MOE), modulus of rupture (MOR), and internal bond (IB) properties of the panels and compare the age effect on the physical and mechanical properties of the fiberboard ... 3.1.2 Physical and Mechanical Properties Specific gravity (SG) is a measure of the density of a substance The specific gravity of a substance is a comparison of its density to that of water The specific ... utilization The physical and mechanical properties of bamboo vary with the age of the bamboo and the height of the culm [Chauhan 2000] In general, SG and the properties of bamboo drop from the top...

Ngày tải lên: 22/02/2014, 09:20

... Cardiac Physiology Page of 23 MECHANICAL PROPERTIES OF THE HEART AND ITS INTERACTION WITH THE VASCULAR SYSTEM Daniel Burkhoff MD PhD, Associate Professor of Medicine, Columbia University ... Let us first examine the properties of the ventricle at end-diastole Imagine the ventricle frozen in time in a state of complete relaxation We can think of the properties of this ventricle with ... measure of the arterial properties and therefore is not useful within the context of indexing the afterload of the ventricular chamber Page 18 of 23 IX QUANTIFYING THE PERFORMANCE DETERMINANTS OF...

Ngày tải lên: 22/02/2014, 09:20

... Chapter 10 Electrical and Magnetic Properties of Thin Films 451 10.1 Introduction to Electrical Properties of Thin Films 451 Conduction in Metal Films ... years Thin Films - A Historical Perspective Thin- film technology is simultaneously one of the oldest arts and one of the newest sciences Involvement with thin films dates to the metal ages of antiquity ... Optical Properties of Thin Films 507 11.1 Introduction 507 11.2 Properties of Optical Film Materials 508 11.3 Thin- Film...

Ngày tải lên: 05/03/2014, 17:20

... P (1940) A study of polymers III Technique of mechanical tests of vulcanizates of rubber and plastics Rubber Chem Tech., 13, 904–917 Haward, R.N (1942) Extension and rupture of cellulose acetate ... full recovery of plastic deformation [8, 9] I NTRODUCTION 1.3 Molecular background Independent of the stress level or amount of deformation involved, the origin of the deformation of polymer materials ... mechanism in the range of temperatures and strain rates of interest A linear dependence of yield stress as a function of log strain rate can be observed over a large interval of strain rates and...

Ngày tải lên: 09/03/2014, 00:20

... of the mechanical properties of materials It is not intended to be a comprehensive review of all the different aspects of mechanical properties; such a task would be beyond the capabilities of ... Inc 1 Overview of Crystal/Defect Structure and Mechanical Properties and Behavior 1.1 INTRODUCTION The mechanical behavior of materials describes the response of materials to mechanical loads ... macroscopic level of understanding of structure [Figs 16(a)–(d)] They are often unaware of the atomic and microstructural constituents that can affect the mechanical behavior of materials and of the role...

Ngày tải lên: 14/03/2014, 17:44

... number of atoms of core–shell nanowires are fixed to be 2524 The ˚ unit of the length is in a Table The optimal structural parameters of Si-core/Ge-shell nanowires Radius of core Outer radius of shell ... work is partially supported by the Fund of University of Science and Technology of China, the Fund of Chinese Academy of Science, and by NSFC with code number of 50121202, 60444005, 10574115 and ... about the basic trends in Young’s modulus of the Si/Ge core– shell nanowires can be helpful for understandings of the mechanical properties for other kinds of core–shell nanowires Acknowledgments...

Ngày tải lên: 16/03/2014, 15:22

... have desirable mechanical properties at an economical cost For this reason, the mechanical properties may be considered the most important of all the physical and chemical properties of high polymers ... t h e mechanical properties of polymers very complex if it were not for some general phenomena and principles that underlie a l l of these various properties and determine t h e outcome of various ... moderate rates of deformation, the amorphous polymer is soft and flexible and is either an elastomer or a very viscous l i q u i d , Mechanical properties show profound changes in the region of the glass...

Ngày tải lên: 22/03/2014, 12:20

... have desirable mechanical properties at an economical cost For this reason, the mechanical properties may be considered the most important of all the physical and chemical properties of high polymers ... t h e mechanical properties of polymers very complex if it were not for some general phenomena and principles that underlie a l l of these various properties and determine t h e outcome of various ... moderate rates of deformation, the amorphous polymer is soft and flexible and is either an elastomer or a very viscous l i q u i d , Mechanical properties show profound changes in the region of the glass...

Ngày tải lên: 22/03/2014, 13:20

... deformations Mechanical Properties of Carbon Nanotubes 297 Fig HREM images of bent nanotubes under mechanical duress (a) and (b) single kinks in the middle of SWNT with diameters of 0.8 and 1.2 ... number of experimental measurements of the Young’s modulus of nanotubes have been reported The first such study [71] correlated the amplitude of the thermal vibrations of the free ends of anchored ... nevertheless indicative of the exceptional axial stiffness of these materials More recently studies Mechanical Properties of Carbon Nanotubes 293 Fig Top panel: bright field TEM images of free-standing...

Ngày tải lên: 24/03/2014, 05:20

... measure of a material’s mechanical properties, and all students of Mechanics of Materials will encounter them often However, they are not without some subtlety, especially in the case of ductile ... measure of the internal forces within the material Much of Mechanics of Materials is concerned with elaborating this concept to include higher orders of dimensionality, working out methods of determining ... microstructure of the material Figure 1.1: The tension test One of the pivotal historical developments in our understanding of material mechanical properties was the realization that the strength of a...

Ngày tải lên: 24/03/2014, 05:20

... Figure Comparison of experimental modulus with calculated tensile moduli ESTIMATION OF MECHANICAL PROPERTIES OF POLYMERS 1343 Data - calculated Temperature, K Figure Tensile modulus of polystyrene ... ESTIMATION OF MECHANICAL PROPERTIES OF POLYMERS 1335 3e-04 ?c 2e-04 \ i h 2i aJ x le-04 Oe+00 PS AMS PC PPO POMS I 100 300 200 400 500 Temperature, K Figure Thermal expansion data of Roe and ... + dez (25) ESTIMATION OF MECHANICAL PROPERTIES OF POLYMERS where the subscripts x , y , and z denote the stresses and strains in three principal directions In the case of a material being stretched...

Ngày tải lên: 01/04/2014, 00:20

... 32 Table 3–5 Summary of mechanical properties and chemical compositions for steels from low-strength perimeter columns 40 Table 3–6 Summary of mechanical properties and chemical ... Summary of mechanical properties, chemical compositions, and relevant ASTM and Yawata specifications for steels from high-strength perimeter columns 45 Table 3–8 Summary of mechanical properties ... 57 Table 3–11 Summary of mechanical properties and chemical compositions, and specifications for truss steels tested 58 Table 3–12 Summary of mechanical properties, chemical compositions...

Ngày tải lên: 01/04/2014, 00:20

... novel properties [11] Keeping this incentive in mind, the purpose of this paper is to provide an overview of the basic understanding of the mechanical properties of these materials A number of techniques ... A great deal of the early work on mechanical properties of nanocrystalline materials used the inert gas condensation technique One shortcoming is the possibility of contamination of powders and ... grains with approximately 500 nm size Mechanical properties of nanocrystalline metals and alloys In this section, we review the principal mechanical properties of nanocrystalline metals: yield stress,...

Ngày tải lên: 01/04/2014, 00:20