• 제목/요약/키워드: Reaction sintering(RS)

검색결과 6건 처리시간 0.016초

나노입자 혼합 복합슬러리를 이용한 반응소결 SiC 재료의 제조 (Fabrication of Reaction Sintered SiC Materials by Complex Slurry with Nano Size Particles)

  • 이상필
    • 대한기계학회논문집A
    • /
    • 제29권3호
    • /
    • pp.425-431
    • /
    • 2005
  • The efficiency of complex slurry preparation route for developing the high performance SiC matrix of $RS-SiC_{f}/SiC$ composites has been investigated. The green bodies for RS-SiC materials prior to the infiltration of molten silicon were prepared with various C/SiC complex slurries, which associated with both the sizes of starting SiC particles and the blending conditions of starting SiC and C particles. The characterization of Rs-SiC materials was examined by means of SEM, EDS and three point bending test. Based on the mechanical property-microstructure correlation, the process optimization is also discussed. The flexural strength of Rs-SiC materials greatly depended on the content of residual Si. The decrease of starting SiC particle size in the C/SiC complex slurry was effective for improving the flexural strength of RS-SiC materials.

SrAl2Si2O8 ceramic matrices for 90Sr immobilization obtained via spark plasma sintering-reactive synthesis

  • Papynov, E.K.;Belov, A.A.;Shichalin, O.O.;Buravlev, I. Yu;Azon, S.A.;Golub, A.V.;Gerasimenko, A.V.;Parotkina, Yu. А.;Zavjalov, A.P.;Tananaev, I.G.;Sergienko, V.I.
    • Nuclear Engineering and Technology
    • /
    • 제53권7호
    • /
    • pp.2289-2294
    • /
    • 2021
  • In the present study, an original spark plasma sintering-reactive synthesis (SPS-RS) method for minerallike ceramic materials based on SrAl2Si2O8 feldspar-like skeleton structure was used for the first time, promising solid-state matrices for reliable immobilization of high-energy 90Sr. The method is based on the "in-situ" reaction of a mixture of SrO, Al2O3 and SiO2 oxides when heated by a unipolar pulsed current under compacting pressure. The phase and elemental composition structure were studied. The dynamics of the consolidation of the reaction mixture of oxides was studied in the range of 900-1200 ℃. The study found the temperature of the high-speed (minutes) SPS-RS formation of single-phase SrAl2Si2O8 composition ceramic in the absence of intermediate reaction products with a relative density of up to 99.2% and compressive strength up to 145 MPa and a strontium leaching rate of 10-4g/cm2·day.

반응소결 SiC 재료의 제조 및 특성 (Fabrication and Characterization of Reaction Sintered SiC Based Materials)

  • 진준옥;이상필;박이현;황희진;윤한기
    • 한국해양공학회:학술대회논문집
    • /
    • 한국해양공학회 2003년도 춘계학술대회 논문집
    • /
    • pp.294-299
    • /
    • 2003
  • The efficiency of complex slurry preparation route for the development of high performance RS-SiCf/SiC composites has been investigated. The green bodies for RS-SiC and RS-SiCf/SiC composite materials prior to the infiltration of molten silicon were prepared with various C/SiC complex matrix slurries, which associated with both different sizes of starting SiC particles and blending ratios of starting SiC and carbon particles. The reinforcing materials in the composite system were uncoated and C coated Tyranno SA SiC fiber. The characterization of RS-SiC and RS-SiCf/SiC composite materials was examined by means of SEM, EDS and three point bending test. Based on the mechanical property-microstructure correlation, process optimization methodology is discussed.

  • PDF

용융함침법에 의한 반응소결 SiC/SiC 복합재료의 특성 평가 (Property Evaluation of Reaction Sintered SiC/SiC Composites Fabricated by Melt Infiltration Process)

  • 이상필;신윤석
    • 대한기계학회논문집A
    • /
    • 제31권2호
    • /
    • pp.205-210
    • /
    • 2007
  • SiC/SiC composites and monolithic SiC materials have been fabricated by the melt infiltration process, through the creation of crystallized SiC phase by the chemical reaction of C and Si. The reinforcing material used in this system was a braided Hi-Nicalon SiC fiber with double interphases of BN and SiC. The microstructures and the mechanical properties of RS-SiC based materials were investigated through means of SEM, TEM, EDS and three point bending test. The matrix morphology of RS-SiS/SiC composites was greatly composed of the SiC phases that the chemical composition of Si and C is different. The TEM analysis showed that the crystallized SiC phases were finely distributed in the matrix region of RS-SiC/SiC composites. RS-SiC/SiC composites also represented a good flexural strength and a high density, accompanying a pseudo failure behavior.

반응소결 SiC 재료의 미세조직 및 강도 특성 (Microstructure and Strength Property of Reaction Sintered SiC Materials)

  • 이상필;신윤석;이진경
    • 한국해양공학회:학술대회논문집
    • /
    • 한국해양공학회 2004년도 학술대회지
    • /
    • pp.380-385
    • /
    • 2004
  • The efficiency of complex slurry preparation route for developing the high performance SiC matrix of RS-SiCf/SiC composites has been investigated. The green bodies for RS-SiC materials prior to the infiltration of nw/ten silicon were prepared with various C/SiC complex matrix slurries, which associated with both different sizes of starting SiC particles and blending ratios of starting SiC and carbon particles. The characterization of RS-SiC materials was examined by means of SEM, TEM, EDS and three point bending test. Based on the mechanical property-microstructure correlation, process optimization methodology is also discussed. The flexural strength of RS-SiC materials greatly depended on the content of residual Si. The decrease of starting SiC particle size in the C/SiC complex slurry was effective for improving the flexural strength of RS-SiC materials.

  • PDF

SiC 장섬유 강화 SiC 기지 복합재료의 고온강도 특성 (High Temeprature Strength Property of Continuous SiC Fiber Reinforced SiC Matrix Composites)

  • 신윤석;이상필;이진경;이준현
    • 한국복합재료학회:학술대회논문집
    • /
    • 한국복합재료학회 2005년도 춘계학술발표대회 논문집
    • /
    • pp.102-105
    • /
    • 2005
  • The mechanical properties of $SiC_f/SiC$ composites reinforced with continuous SiC fiber have been investigated in conjunction with the detailed analysis of their microstructures. Especially, the effect of test temperature on the characterization of $SiC_f/SiC$ composites was examined. In this composite system, a braiding Hi-Nicalon SiC fibric was selected as a reinforcement. $SiC_f/SiC$ composites have been fabricated by the reaction sintering process, using the complex matrix slurry with a constant composition ratio of SiC and C particles. The characterization of $RS-SiC_f/SiC$ composites was investigated by means of SEM, EDS and three point bending test. Based on the mechanical property-microstructure correlation, the high temperature applicability of $RS-SiC_f/SiC$ composites was discussed.

  • PDF