| 1. |
- Dalarsson, Nils, et al.
(författare)
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A simplified analytical approach to calculation of the electromagnetic behavior of left-handed metamaterials with a graded refractive index profile
- 2007
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Ingår i: SCIENCE OF SINTERING. - 0350-820X. ; 39:2, s. 185-191
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Tidskriftsartikel (refereegranskat)abstract
- We investigated the spectral properties of a new class of nanostructured artificial composite materials with tailored electromagnetic response, i.e. negative refractive index materials, also known as "left-handed" metamaterials. We analyzed structures incorporating both ordinary positive index media and negative refractive index metamaterials where the interface may be graded to art arbitrary degree. Utilizing a modified version of the Rosen-Morse function, we derived analytical expressions for the field intensity and spectral reflection and transmission through a graded interface between positive and negative index materials. We compared our results to numerical solutions obtained using the transfer matrix technique.
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| 2. |
- Easterling, K.E., et al.
(författare)
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Some recent developments in powder metallurgy in Sweden
- 1979
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Ingår i: Science of Sintering. - 0350-820X. ; 11:spec, s. 105-120
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Tidskriftsartikel (refereegranskat)abstract
- The authors concentrate on some recent scientific and technological developments in the two main areas of activity in Sweden, i.e. cemented carbides and steel powder metallurgy. They also give a few details of some interesting preliminary work on the hot isostatic pressing of silicon nitride and the development of sintered oxide containers for storing nuclear waste materials
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| 3. |
- Lin, C., et al.
(författare)
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Nano Pores Evolution in Hydroxyapatite Microsphere during Spark Plasma Sintering
- 2011
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Ingår i: Science of Sintering. - 0350-820X. ; 43:1, s. 39-46
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Tidskriftsartikel (refereegranskat)abstract
- Micron-spherical granules of hydroxyapatite (HAp) nanoparticles were prepared by powder granulation methods. Through subsequent sintering, porous HAp microspheres with tailored pore and grain framework structures were obtained. Detailed microstructure investigation by SEM and TEM revealed the correlation of the pore structure and the necking strength with the sintering profiles that determine the coalescence features of the nanoparticles. The partially sintered porous HAp microspheres containing more than 50% porosity consisting of pores and grains both in nano-scale are active in inducing the precipitation of HAp in simulated body fluid. The nano-porous HAp microspheres with an extensive surface and interconnecting pores thus demonstrate the potential of stimulating the formation of collagen and bone and the integration with the newly formed bones during physiological bone remodeling.
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| 4. |
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| 5. |
- Pouchly, V., et al.
(författare)
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Master Sintering Surface : A practical approach to its construction and utilization for Spark Plasma Sintering prediction
- 2012
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Ingår i: Science of Sintering. - 0350-820X. ; 44:2, s. 169-175
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Tidskriftsartikel (refereegranskat)abstract
- The sintering is a complex thermally activated process, thus any prediction of sintering behaviour is very welcome not only for industrial purposes. Presented paper shows the possibility of densification prediction based on concept of Master Sintering Surface (MSS) for pressure assisted Spark Plasma Sintering (SPS). User friendly software for evaluation of the MSS is presented. The concept was used for densification prediction of alumina ceramics sintered by SPS.
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