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...

Ngày tải lên: 11/09/2015, 09:16

... 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-...

Ngày tải lên: 22/06/2014, 00:20

... 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 micros...

Ngày tải lên: 10/09/2015, 15:48

... 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 sol...

Ngày tải lên: 14/09/2015, 14:10

... 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 inter...

Ngày tải lên: 14/09/2015, 14:10

... 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-...

Ngày tải lên: 14/09/2015, 14:10

... 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 gro...

Ngày tải lên: 14/09/2015, 14:10

... [ 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 insign...

Ngày tải lên: 14/09/2015, 14:11

... 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...

Ngày tải lên: 14/09/2015, 14:11

... 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...

Ngày tải lên: 14/09/2015, 14:11

... 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 bi...

Ngày tải lên: 30/09/2015, 13:41

... 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 dep...

Ngày tải lên: 07/10/2015, 10:10

... 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...

Ngày tải lên: 22/02/2014, 09:20

... (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...

Ngày tải lên: 14/03/2014, 13:20

... 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 las...

Ngày tải lên: 06/05/2014, 08:54