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Fig. 1: Various configurations of a chevron-notched test specimens, adopted from [3] Introduction Destructive tests of specimens from quasi-brittle materials subjected to three-point bending (3PB [1]) are very common way of testing of various building structures (and its parts).
Later applications on rock materials made it to be suitable instrument for evaluation of fracture toughness KIC [5,6] – the International Society for Rock Mechanics (ISRM) has proposed it to be suggested as method for testing rock’s fracture toughness [7,8,9].
Acknowledgement The financial support from Czech Science Foundation (project No. 15-07210S) is gratefully acknowledged.
References [1] RILEM Technical Committee 50-FMC: Materials and Structures. 18-4 (1985), p. 285–290 [2] J.
Nakayama: Japan Journal of Applied Physics 3 (1964), p. 422–423 [3] J.H.

Citation & Copyright (to be inserted by the publisher) Synthesis of ZnO Nanoparticles Embedded in a Polymeric Matrix; Effect of Curing Temperature Hyung Jun Jeon, Yoon Chung, Sun Young Kim, Chong Seung Yoon, and Young-Ho Kim � Dep. of Materials Engineering, Hanyang University, 17 Haengdang-dong, Seongdong-Ku, Seoul 133-791, Korea Keywords: metal oxide nanoparticle, polyimide, Imidization, curing temperature Abstract.
Introduction Nanomaterials currently receive much attention as they represent a new class of materials, which promises new properties and products, and new processing paths.
It is important to fabricate semiconductor nanoparticles, which have new physical, chemical properties to different from the bulk materials [4,5].
ZnO particles with 10 nm were randomly dispersed in the PI layer, which is similar to the observation Journal Title and Volume Number (to be inserted by the publisher) in the planar TEM (Fig. 1 (c)).
Acknowledgement This research was performed by the financial support of ‘Center for Nanostructured Materials Technology’ under ‘21st Century Frontier R&D Programs’ of the Ministry of Science and Technology, Korea References [1] A.P.

Mechanisms and Machine Science 48, Springer, (2016) [9] D.
Geonea et al., Design and Motion Analysis of a Powered Wheelchair, Applied Mechanics and Materials, Vol. 772, pp. 613-620, (2015) [11] I.
Geonea et al., New Assistive Device for People with Motor Disabilities, Applied Mechanics and Materials, Vol. 772, pp. 574-579, (2015) [12] I.
Geonea et al., Design and Simulation of a Single DOF Human-Like Leg Mechanism, Applied Mechanics and Materials, Vol. 332, pp. 491-496, (2013) [13] I.
Geonea et al., Design and Simulation of a Mechanism for Human Leg Motion Assistance, Advanced Materials Research, Vol. 1036, pp. 811-816, (2014) [14] I.

Introduction With the heat from the reaction between the metal oxides and aluminum powder being the heat source,SHS welding technology fabricates the fusion welding joint with certain shape and size utilizing reduced molten metal flowing out to directly or indirectly heat the workpiece.Compared with traditional welding technology,the SHS welding technology possesses following features[1]: (1)it can utilize reaction's raw materials to synthesize gradient material to weld different types of material,in order to overcome the incompatibility of the chemical,mechanical and physical properties between different base metals;(2)strengthening phase such as strengthening particles, short fiber,crystal whisker and so on can be added into the welding powder to increase the number of materials available to be welded and intensify the hardness of the welding joint;(3)it generates certain amount of energy which can be used in the weld,saving energy in one word;(4)in so far as the weld of some certain
Experimental materials and methods The experiment's base metal is steel Q235,while the welding powder contains 11% of the aluminum powder(200 mesh),55% of the metal oxides containing 88% of the copper oxide and 2% of the slag forming constituent.When welding,igniting the igniting agent will cause the SHS reaction to happen automatically thus welding the workpiece as well.In essence,this reaction is a redox reaction of aluminum and copper oxide,and the reaction equation is as follows: 2Al+3CuO=Al2O3+3Cu+1519KJ/mol  (1) The adiabatic combustion temperature of the reaction above is 5151K,which in theory is adequate to melt the steel components[2].As the base of the welding metal,copper can be obtained in the reaction,stuffed in the welding seam between the base metals and satisfied the requirement of welding base metal.
Zhu: Hebei Journal of Industrial Science and Technology, Vol. 25 (2008) No.4, p.193-195, in Chinese

Biomass usually refers to plant material and waste products, which can be used as fuel.
Materials are entered into the reburning zone from the top with the feed system.
Temperature is controlled by the intelligent temperature control system. 2.2 Experimental Analysis of Raw Materials The experimental biomass material is rice husk and Poplar which are from the Northeast.
Progress in Energy and combustion science, vol. 7 (2001), pp. 171-214 [2] X.
Chemical Engineering Journal, vol. 91(2003), pp. 87-102 [4] D.

Experimental The NASICON powder with the composition Na1+xZr2SixP3-xO12(x＝2) were prepared through sol-gel method and used as the raw materials for NASICON ceramics.
It is well known that the dielectric constant of air is much lower (ε'＝1, ε"=0) than that of any other materials(ε'>1, ε">0).
Traversa : Journal of Electroceramics. 13 (2004), p. 817-823 [6] H.
Govindaraj: Materials Science and Engineering B-Solid State Materials For Advanced Technology. 94 (2002), p.82-88 10 1 10 2 10 3 10 4 10 5 10 6 10 7 10 8 10 1 10 2 10 3 10 4 10 5 10 6 ε'(ω) Frequency(Hz) d b a 10 1 10 2 10 3 10 4 10 5 10 6 10 7 10 8 10 0 10 1 10 2 10 3 10 4 10 5 10 6 10 7 ε"(ω) Frequency(Hz) d b a c Real part ε'(ω) Imaginary part ε"(ω) Fig.3 Plots of real part ε'(ω) and imaginary part ε"(ω) of complex dielectric constant vs frequency for the samples (a)1000 oC; (b) 1050o C; (c) 1100 oC (d) 1150oC C

Introduction Nowadays magnesium alloys become the most developing potentially material due to theirs low density, high specific strength, good shock absorption ability and excellent cutting performance, which is widely applied in aeronautic, automobile, electronics and communications industries[1,2].
While subsequent thermal treatment can further enhance mechanical properties to satisfy the needs of structural materials.
Material and experimental The experimental samples were taken from as-cast AZ80 magnesium alloy billets.
References [1] Changxu Shi, Hengde Li, and Dianzuo Wang: Materials Review, Vol, 15(2001), p. 526-531 [2] Dahle A K, Lee Y C, Mark D M: Journal of Light Metals, Vol, 1(2001), p. 61-72 [3] Adolph Beck: The technology of magnesium and its alloys(F.
China, Vol. 13(2003), p. 1253-1259 [5] Zhaozhi Li, Yaqin Yang, Zhimin Zhang and Baocheng Li: Hot Woking Technology, Vol. 37(2008), p. 66-70 (In Chinese) [6] Wang R M, Eliezer A: Materials Science and Engineering A, Vol, 335(2003), p.201-207

Material property parameter.
Material property parameter.
He: Journal of Yangzhou Polytechnic College.
Jin: Journal of Hydraulic Engineering.
Fre′de′ric: Construction and Building Materials.

However, no significant improvement of power factor is obtained in these bottom-up prepared nanomaterials when comparing with the bulk Bi2Te3 materials [2].
Dyck, Clemens Burda, Toward high-performance nanostructured thermoelectric materials: the progress of bottom-up solution chemistry approaches, J.
Elsasser, Nanostructure, Excitations, and Thermoelectric Properties of Bi2Te3-Based Nanomaterials, Journal of Electroni Materials. 41(2012) 1792–1798
Tu, Aqueous chemical reduction synthesis of Bi2Te3 nanowires with surfactant assistance, Materials Letters. 60 (2006) 2534–2537
[8] Yanhua Zhang, Guiying Xu, Pan Ren, Ze Wang, Changchun Ge, Effects of Various Reductants and Surfactants on the Nanostructure of Bi2Te3 Synthesized by a Hydrothermal Process, Journal of Electronic Materials. 40 (2011) 835–839

Various researchers studied tribological damages of PEEK or PEEK composite materials for mechanical parts [4-6].
Materials of the bearing’s ball and retainer were Alumina and PTFE composite (PTFE and carbon graphite), respectively.
[15] Ali Yousefpour, Mehdi Hojjati, Jean-Pierre Immarigeon, Fusion Bonding/Welding of Thermoplastic Composites, Journal of Thermoplastic Composite Materials, SAGE, 17, (2004), 303-341
Polymer Engineering and Science 31, (1991), 526-532
Kida, Observation of Tribological Wear on PEEK Shaft with Artificial Defect under Radial Rolling Sliding Point Contact, Key Engineering Materials, 858, (2020), 95-100