Application of micro cantilevers in characterization of crystallization induced stresses and mechanical properties of amorphous thin films

... micro- fabricated cantilevers were used to investigate the stresses and density changes upon crystallization in amorphous thin films Two classes of materials with distinct properties and significant ... of Young’s modulus 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 ... equipment, Prof Chua Soo Jin from the Institute of Materials Research and Engineering (IMRE) for my access to the sputter equipment, and Dr Yu Hongbin from the NUS Department of Mechanical Engineering...

Báo cáo hóa học: " Hydrothermal Growth and Application of ZnO Nanowire Films with ZnO and TiO2 Buffer Layers in Dye-Sensitized Solar Cells" docx

... 0.86–1.02% by introducing the TiO2 blocking layer The increase in Isc can be attributed to the increase in the aspect ratio of the nanowire arrays with and without the TiO2 blocking layer from ... spincoating, resulting in the maximum loss of Voc (about 40 mV) In order to further investigate the effect of a TiO2 buffer layer on the performance of ZnO nanowire- based DSSCs, a TiO2 blocking ... by introducing a blocking layer at the base of the ZnO ﬁlms, the in uence of the blocking layer on the performance of ZnO DSSCs is an ongoing debate [10] In this study, we report that the ZnO nanowire...

Preparation and characterization of ferroelectric thin films for tunable and pyroelectric applications

... potential of BTS thin films The efforts toward improving the tunable and pyroelectric properties of BTS thin films have demonstrated the appealing prospective applications of BTS thin films in the ... investigating the tunable and pyroelectric properties of the B-site doped BaTiO3, i.e., Ba(Ti1-xSnx)O3 (BTS) thin films The effects of stress and microstructure on the tunable properties of BTS thin films ... Shu and P Wu, Comparative study of effects of Mo and W dopants on the ferroelectric properties of Pb(Zr0.3Ti0.7)O3 thin films, Journal of Physics D 41, 135402 (2008) S.J Wang, L Lu, M.O Lai, “Pyroelectric...

Processing and mechanical properties of pure mg and in situ aln reinforced mg 5al composite 1

... mechanochemical milling Synthesis of Mg- 5wt%Al reinforced with 1wt% of in- situ formed AlN via mechanical milling and power metallurgy techniques Study of microstructures and mechanical properties of Mg MMCs ... combination of strength and ductility of the nc Mg composite Introduction Grain refinement, reinforcement particles, dislocation and solid solution contribute to the strengthening of Mg composite ... milling durations Investigation of the deformation behavior of Mg- 5wt%Al-1wt %AlN systems Introduction 1. 3 Scope of the thesis This thesis is composed of seven chapters including this chapter of introduction...

Processing and mechanical properties of pure mg and in situ aln reinforced mg 5al composite 2

... recovery during milling was confirmed by the corresponding low internal strain The internal strain during milling showed inverse grain size dependence Absence of dislocations within the grains of as ... Crystalline Grain boundary Triple line Quadruple node Intercrystalline 0.6 0.4 0 .2 0.0 10 100 1000 G rain S ize (nm ) Figure 2. 6 Plot of volume fractions of crystalline and intercrystalline components ... substantial influence of texture on mechanical properties is observed in extruded Mg [104, 105] exhibiting higher yield stress of unreinforced extruded Mg with respect to Mg- Y2O3 [106] As the testing...

Processing and mechanical properties of pure mg and in situ aln reinforced mg 5al composite 3

... JIM 34 (19 93) 952-959 Y Ogino, S Murayama, T Yamasaki, J Less-Common Met 168 (1991) 221- 235 67 In- situ formation of Aluminium Nitride composite powder 27 28 29 30 31 32 33 34 35 36 37 38 39 40 ... evidence of weak and broad AlN peaks The proportion of AlN in the powder increased with further milling Higher and distinct AlN peaks indicating higher 51 In- situ formation of Aluminium Nitride composite ... (b) Figure 3. 1 (a) Morphology of Al powder and (b) structure of pyrazine In this study, in- situ formed AlN composite powder is obtained by milling the mixture of elemental Al with pyrazine (C4H4N2)...

Processing and mechanical properties of pure mg and in situ aln reinforced mg 5al composite 4

... resistivity of Mg- 5Al- 1AlN composite sample and pure Mg samples 4. 3.3 Thermal properties From Table 4. 3 and Fig 4. 8, the same trend of αc and Mg is observed for both composite and pure Mg samples Milling ... as AlN and in- situ formed Al1 2Mg1 7, MgH2, MgAl2O4, and MgO during sintering and extrusion Such stable grain structure with no grain growth up to 550°C has been reported in commercially pure Mg ... increasing milling duration, broadening of XRD peaks and declining in peak intensity are observed due to the reduction in grain size and introduction of microstrain during milling In Fig 4. 1(b), intensities...

Processing and mechanical properties of pure mg and in situ aln reinforced mg 5al composite 5

... [ 15] and Wang et al [ 35] A ctivation v o lum e (b ) 300 Mg- 5Al- 1AlN Mg 30 40 250 200 150 100 50 0 10 20 M illing du ratio n (h) Figure 5. 8 Apparent activation volume of composite and pure Mg ... Fig 5. 5 and Table 5. 2, as in the composite samples, 0h-MMed samples show similar ductility of 8-10% and yield stress ranging from 122 to 138 MPa indicating insignificant dependence of strain rate ... decreasing strain rate and increasing milling duration However, no significant increase in ductility with milling duration at the highest strain Elongation (%) rate is detected 45 40 35 30 25 20 15...

Processing and mechanical properties of pure mg and in situ aln reinforced mg 5al composite 6

... fraction of second phase constituents, since the Mg grain size is in nanoscale and thus less likely for the reinforcement and in- situ formed particles to exist in the interior of the Mg grain, this ... meaning defined previously Using the parameters for Mg in Table 6. 2, a theoretical value of Dgb is predicted to be 3.7410-28 m2 s-1 However, Qgb value in Table 6. 2 is for coarse grain Mg and ... [6, 10,12,19]), eutectic alloys [20] and discontinuously reinforced metal-matrix composites [21-25] display an indirect evidence of diffusionally accommodated sliding at phase boundaries and interfaces...

Processing and mechanical properties of pure mg and in situ aln reinforced mg 5al composite 7

... 40h-MMed pure Mg samples This finding implies that the grain refinement to a certain length scale diminishes the significance of solid solution strengthening and dispersion hardening 30hMMed composite ... examination can be performed on the pure Mg samples to confirm the diminishing effect of reinforcements (insitu formed second phase particles and/ or ex -situ reinforcement particles) when the grain ... grain sizes and then performing systematic tests under identical conditions of temperature and stress for the purpose of determining the values of the grain size sensitivity, and (c) performing...

Application of biocompatible thin organic coatings to improve tribology of ti6al4v alloy

... APPLICATION OF BIOCOMPATIBLE THIN ORGANIC COATINGS TO IMPROVE TRIBOLOGY OF TI6AL4V ALLOY BHARAT PANJWANI (B.Tech, IIT Kanpur, India) A THESIS SUBMITTED FOR THE DEGREE OF MASTER OF ENGINEERING ... and its alloys In this thesis, application of thin organic coatings to improve tribology of titanium and its alloys has been explored with emphasis on biomedical applications Ti6Al4V alloy, a ... tribological limitations of Ti6Al4V alloy In this study, following approaches have been used:  Use of PFPE to improve the tribological properties of Ti6Al4V alloy  Use of PFPE overcoat to improve the tribological...

Growth and characterization of oxide thin films on silicon by pulsed laser deposition

... method of pulsed laser deposition (PLD); investigate the growth mechanism of high quality MgO films on silicon Fabricate highly oriented CoFe2O4 films on silicon with the help of MgO buffer layer and ... thesis 2.1.1 Pulsed- laser deposition One of the most significant approaches to oxide film growth is pulsed- laser deposition Pulsed- laser deposition (PLD) is now a widely used deposition approach ... BiFeO3 thin films on silicon with the Pt buffer by the method of PLD; investigate ferroelectric, ferromagnetic and magnetoelectric properties of these Ba-doped BiFeO3 thin films on silicon and their...

Tài liệu PHYSICAL, CHEMICAL, AND MECHANICAL PROPERTIES OF BAMBOO AND ITS UTILIZATION POTENTIAL FOR FIBERBOARD MANUFACTURING docx

... performance characteristics and mechanical properties of bamboo Dissertation, Chinese Academy of Forestry, Beijing, China pp 147 Yusoff, M.N.M, A Abd.Kadir, and A.H Mohamed 1992 Utilization of bamboo ... the physical properties of pulp [Tamolong 1967; Zamuco et al 1969] Aging of a bamboo culm influences physical, chemical, and mechanical properties, and consequently its processing and utilization ... 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...

Báo cáo " Growth of CdS thin films by chemical bath deposition technique " pptx

... (311) planes of cubic CdS [10] Fig Typical X-ray diffractogram of CdS thin films as grown Inset shows XRD pattern of the CdS thin films reported in [9] Table Standard ASTM card for CdS [10] 2θ ... spectra of thin films growth by the spray pyrolysis technique consist of a characteristic red band centered at about 698 nm The apparition of this red band may be assigned to the excess of Cd2+ ... photoluminescence spectrum of the as-prepared CdS thin films Conclusions In this work, we show a route to the deposition of CdS thin film on glass substrates using CBD technique from heated solutions...

temporal profile of optical transmission probe for pulsed laser heating of amorphous silicon films

... histories for these fluences The peak temperature occurs approximately at a time of 15 ns The temperature profiles across the thickness of the silicon layer are shown in Fig for a laser fluence, ... Surface temperature histories for a 0.2 pm-thick amorphous silicon layer, irradiated with an excimer laser (A=O.248 pm) for laser fluences F= 19.6,31.6,46.6 mJicm’ The laser pulse length ~-26 ns ... calculated using the expression for the normal incidence reflectivity of bulk material surfaces, ~~,,,=[(n-1)2+~]/[(n+1)2+k?]=0.545 Measurements of the laser pulse temporal profile have shown that the...

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Từ khóa: preparation and properties of sio2 thin films by the sol gel method using photoirradiation and its application to surface coating for display fabrication and characterization of magnetic thin films high frequency permeability and characterization of magnetic thin films 6 optical and mechanical properties of fibers sintering of ternary copper alloys powder metalurgy electrical and mechanical properties eff molecular structure analyses of sio2 thin films chemical solution deposition of ferroelectric thin films use of supported thin films of peptide amphiphiles as model systems of the extracellular matrix to study the effects of structure function phenomena on cell adhesion 4—physical and mechanical properties of structural lightweightaggregate concrete elegans vary in susceptibility to uvc induced nuclear and mitochondrial dna damage murugesu b 2008 milling in augsburger l l hoag s w eds pharmaceutical dosage forms unit operations and mechanical properties 3rd ed pp 175 193 application of differential equations in engineering application of partial differential equation in engineering field application of partial differential equation in civil engineering application of partial differential equation in engineering Nghiên cứu sự biến đổi một số cytokin ở bệnh nhân xơ cứng bì hệ thống Báo cáo quy trình mua hàng CT CP Công Nghệ NPV Biện pháp quản lý hoạt động dạy hát xoan trong trường trung học cơ sở huyện lâm thao, phú thọ Giáo án Sinh học 11 bài 13: Thực hành phát hiện diệp lục và carôtenôit ĐỒ ÁN NGHIÊN CỨU CÔNG NGHỆ KẾT NỐI VÔ TUYẾN CỰ LY XA, CÔNG SUẤT THẤP LPWAN NGHIÊN CỨU CÔNG NGHỆ KẾT NỐI VÔ TUYẾN CỰ LY XA, CÔNG SUẤT THẤP LPWAN SLIDE Phối hợp giữa phòng văn hóa và thông tin với phòng giáo dục và đào tạo trong việc tuyên truyền, giáo dục, vận động xây dựng nông thôn mới huyện thanh thủy, tỉnh phú thọ Trả hồ sơ điều tra bổ sung đối với các tội xâm phạm sở hữu có tính chất chiếm đoạt theo pháp luật Tố tụng hình sự Việt Nam từ thực tiễn thành phố Hồ Chí Minh (Luận văn thạc sĩ)Phát triển du lịch bền vững trên cơ sở bảo vệ môi trường tự nhiên vịnh hạ long Nghiên cứu, xây dựng phần mềm smartscan và ứng dụng trong bảo vệ mạng máy tính chuyên dùng Thơ nôm tứ tuyệt trào phúng hồ xuân hương Sở hữu ruộng đất và kinh tế nông nghiệp châu ôn (lạng sơn) nửa đầu thế kỷ XIX Chuong 2 nhận dạng rui ro Quản lý nợ xấu tại Agribank chi nhánh huyện Phù Yên, tỉnh Sơn La (Luận văn thạc sĩ)Tranh tụng tại phiên tòa hình sự sơ thẩm theo pháp luật tố tụng hình sự Việt Nam từ thực tiễn xét xử của các Tòa án quân sự Quân khu (Luận văn thạc sĩ)Giáo án Sinh học 11 bài 15: Tiêu hóa ở động vật Giáo án Sinh học 11 bài 14: Thực hành phát hiện hô hấp ở thực vật Giáo án Sinh học 11 bài 14: Thực hành phát hiện hô hấp ở thực vật Chiến lược marketing tại ngân hàng Agribank chi nhánh Sài Gòn từ 2013-2015 HIỆU QUẢ CỦA MÔ HÌNH XỬ LÝ BÙN HOẠT TÍNH BẰNG KIỀM