РОССИЙСКАЯ АКАДЕМИЯ НАУК

УРАЛЬСКОЕ ОТДЕЛЕНИЕ

ИНСТИТУТ ХИМИИ TBEPДОГО ТЕЛА
   
| | | | |
| | | |
 19.05.2014   Карта сайта     Language По-русски По-английски
Новые материалы
Экология
Электротехника и обработка материалов
Медицина
Статистика публикаци


19.05.2014





Fabrication and Characterization of NiTi/Ti3SiC2 and NiTi/Ti2AlC Composites


























Highlights






It is clearly shown that SPS is a viable technique to fabricate highly reactive ceramic-metal systems with active components. 1233 K, 300 MPa, and 8 minutes are optimized processing conditions to produce fully-dense NiTi/Ti3SiC2 composites with maximum fractions of transformable NiTi, which are responsible for the high mechanical damping of the composites.





The Ni and the “A” element diffusions, respectively, from NiTi and MAX phases initiate two-phase reactions. The NiTi-Ti3SiC2 reactions occurred at a lower rate than the NiTi-Ti2AlC reactions, so preserved transformable NiTi in the NiTi/Ti3SiC2 composites is more than that in the NiTi/Ti2AlC composites.









Abstract


Spark plasma sintering (SPS) was used as a fast consolidation technique to reduce reactions during powder consolidation of a highly reactive system (shape memory alloy/ternary carbide composites), which could not otherwise be fabricated using conventional methods. NiTi/Ti2AlC and NiTi/Ti3SiC2 powder mixtures, each with a 50/50 volume ratio, were processed in the 1233–1373 K temperature range under 100–300 MPa for 3–30 minutes. Phase transformation behavior of the composites was studied using differential scanning calorimetry and was compared with starting powders to evaluate the transformable NiTi in the composites. The effects of starting materials and processing conditions (sintering temperature, soaking time, and sintering pressure) on densification, reaction, and transformable NiTi were studied. A high-pressure (300 MPa) run at 1233 K for 8 minutes produced a fully-dense NiTi/Ti3SiC2 composite with a maximum percent of transformable NiTi. Based on phase analysis on the interfacial reaction layers, we developed the reaction mechanisms between NiTi and Ti3SiC2 or Ti2AlC during SPS. It is clearly shown that SPS is a viable technique to fabricate highly reactive ceramic-metal system with active components.




Дизайн и программирование N-Studio 
А Б В Г Д Е Ё Ж З И Й К Л М Н О П Р С Т У Ф Х Ц Ч Ш Щ Ъ Ы Ь Э Ю Я
  • Chen Wev .  honorary member of ISSC science council

  • Harton Vladislav Vadim  honorary member of ISSC science council

  • Lichtenstain Alexandr Iosif  honorary member of ISSC science council

  • Novikov Dimirtii Leonid  honorary member of ISSC science council

  • Yakushev Mikhail Vasilii  honorary member of ISSC science council

  • © 2004-2019 ИХТТ УрО РАН
    беременность, мода, красота, здоровье, диеты, женский журнал, здоровье детей, здоровье ребенка, красота и здоровье, жизнь и здоровье, секреты красоты, воспитание ребенка рождение ребенка,пол ребенка,воспитание ребенка,ребенок дошкольного возраста, дети дошкольного возраста,грудной ребенок,обучение ребенка,родить ребенка,загадки для детей,здоровье ребенка,зачатие ребенка,второй ребенок,определение пола ребенка,будущий ребенок медицина, клиники и больницы, болезни, врач, лечение, доктор, наркология, спид, вич, алкоголизм православные знакомства, православный сайт творчeства, православные рассказы, плохие мысли, православные психологи рождение ребенка,пол ребенка,воспитание ребенка,ребенок дошкольного возраста, дети дошкольного возраста,грудной ребенок,обучение ребенка,родить ребенка,загадки для детей,здоровье ребенка,зачатие ребенка,второй ребенок,определение пола ребенка,будущий ребенок