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 : Mevlüt Gürbüz (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
-
Mechanical, Wear and Thermal Behaviors of Graphene Reinforced Titanium Composites
Mevlüt Gürbüz,Tuğba Mutuk,Pınar Uyan 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.4
In this study, the effects of graphene content (0.15, 0.30, 0.45 and 0.60 wt%) on the mechanical, tribological and thermalproperties of titanium matrix composites were investigated. The experimental results showed that the highest ultimatecompressive strength (845 MPa), tensile strength (613 MPa), lowest mass loss (0.6 mg for 10 N), and lowest wear rate(WR = 286 × 10−5 mm3/Nm for10 N) were obtained for Ti-0.15GNPs compared with pure titanium (652 MPa, 413 MPa,1 mg and 5 × 10−5 mm3/Nm, respectively). The wear rate of composites deteriorates with increasing applied load. Fromthe thermal analysis results, the best thermal conductivity (16 W/mK) and diffusivity (7.1 mm2/s) were performed for Ti-0.30GNPs composites at room temperature. The thermal behavior of the composites was decreased with increasing graphenecontent and temperature. It concluded that graphene is an effective reinforcement to develop the mechanical, wear and thermalbehavior of titanium matrix composites.
-
Sintering of 94Na0.5Bi0.5TiO3-6BaTiO3 with SPS and conventional methods for crystal growth
Mevlüt Gürbüz,Erhan Ayas,Aydin Dogan 한양대학교 세라믹연구소 2016 Journal of Ceramic Processing Research Vol.17 No.1
In this study, lead-free 94Na0.5Bi0.5TiO3-6BaTiO3 (94NBT-6BT) piezoelectric ceramics and embedded single crystals inpolycrystalline 94NBT-6BT matrix were sintered by conventional (CS) and spark plasma sintering (SPS) techniques. Theeffects of SPS and CS on the microstructure of the 94NBT-6BT ceramics were discussed and compared. Theoretical densityof the CS and SPS treated samples were found to be 94% and almost 99.9%, respectively. High porosity and weak seed-matrixinteraction at 1180 oC for 2 h were obtained from CS sintered ceramics. On the other hand, sintered samples with SPS showednon-porous polycrystalline matrix, and quite strong seed-matrix interface bonding at 950 oC for 5 min. Also, dielectricproperties of sintered ceramics with SPS gave better results than CS. Therefore, SPS assisted 94NBT-6BT samples can be usedto grow high quality and high performance single crystals using solid state single crystal growth.
-
Mahmut Can Şenel,Mevlüt Gürbüz 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.7
In the present study, boron carbide and graphene-reinforced aluminum hybrid composites with various boron carbide (1,3, 6, 9, 12, 15, 30 wt%) and graphene nanoplatelets (GNPs) content (0.15, 0.30, 0.45 wt%) were produced by the powdermetallurgy method. The method consists of mixing, ultrasonic dispersing, mixing, fltering, drying, pressing, and sinteringprocesses. The apparent density, compressive strength, and Vickers hardness of the fabricated composites were determined bydensity meter, universal test machine, and micro Vickers hardness measurement device, respectively. The phase and microstructural analysis of the fabricated composites were analyzed using an X-ray difraction device and scanning electron microscope, respectively. The maximum apparent density (2.54±0.005 g/cm3), the highest Vickers hardness (109.8±1.5 HV),the best compressive strength (244±5 MPa), and minimum porosity (4.0%) were obtained at Al-30%B4C-0.15%GNPscomposite. The enhancement in Vickers hardness and compressive strength of Al-30%B4C-0.15%GNPs composite wasdetected as +293% and +190% compared with pure aluminum. In conclusion, it was detected that the mechanical strengthof Al-30B4C-GNPs composites improved up to 0.15 wt%GNPs content. After 0.15 wt%graphene content, the mechanicalstrength of Al-30B4C-GNPs composites decreased due to the agglomerated graphene nanoparticles.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
