http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Miroslav Dramicanin (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
Modification of Cellulose and Rutile Welding Electrode Coating by Infiltrated TiO2 Nanoparticles
Sebastian Balos,Leposava Sidjanin,Miroslav Dramicanin,Danka Labus,Branka Pilic,Mirjana Jovicic 대한금속·재료학회 2016 METALS AND MATERIALS International Vol.22 No.3
In this paper, a novel method of infiltration of TiO2 nanoparticles into the coating of the cellulose and rutile shielded metal arc welding electrode is shown. Tensile properties and strength of weld metals were correlated to the chemical composition of the weld metals, ferrite type, and non-metallic inclusion type, size and composition. As infiltration time is increased in the cellulose electrodes, the non-metallic inclusion count increases and their size decreases. They act as inoculants and lead to the replacement of Widmanstaetten with the finegrained acicular ferrite which increases the mechanical properties of the welds. The modification of rutile electrodes with low and medium infiltration time also refines the microstructure and increases the mechanical properties. Specimens welded with rutile electrodes infiltrated at maximum duration exhibited the lowest mechanical properties due to the relatively large non-metallic inclusions that act as void nucleation sites and the appearance of large grain allotriomorphic ferrite in the weld metal.
-
Intra- and inter-configurational luminescence spectroscopy of Pr3+ -doped YPO4 nanophosphors
B. Kahouadji,L. Guerbous,A. Boukerika,Slobodan D. Dolic,Dragana J. Jovanovic,Miroslav D. Dramicanin 한국물리학회 2018 Current Applied Physics Vol.18 No.4
Nanopowders of YPO4 phosphors with different Pr3+doping were successfully prepared by a sol gel method under different synthesis conditions. The crystallite size and strain show a strong dependence on the Pr3+ doping concentration and on the annealing temperature. By annealing at 300 °C one can obtain the xenotime structure of the pure YPO4. The crystallite size can be controlled by controlling the annealing temperature and it increases with increasing the annealing temperature. The room temperature inter-configurational 4f2 ↔ 4f5d and intra-configurational 4f2↔ 4f2 emission-excitation transitions spectra are measured and investigated. Upon 4f2 → 4f5d excitation transition, all the samples present broad intense emission bands attributed to 4f5d → 4f2 emission transitions and peaks in red region assigned to 1D2→3H4 transition as photon cascade emission phenomena (PCE). The presence of only 1D2→3H4 transition is discussed. In addition, the 1D2 energy level lifetimes as well as the refractive indexes were determined and discussed.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
