Densification and oxidation behavior of a novel TiB2-MoSi2-CrB2 composite

被引：35
|
作者：
Murthy, T. S. R. Ch. [1 ]
Sonber, J. K. [1 ]
Subramanian, C. [1 ]
Hubli, R. C. [1 ]
Krishnamurthy, N. [1 ]
Suri, A. K. [1 ]
机构：
[1] Bhabha Atom Res Ctr, Mat Grp, Bombay 400085, Maharashtra, India
来源：
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2013年 / 36卷
关键词：
TiB2; MoSi2; CrB2; Hot pressing; Microstructure; Oxidation; MECHANICAL-PROPERTIES; TITANIUM DIBORIDE; MONOLITHIC TIB2; MICROSTRUCTURE; RESISTANCE; AL2O3-TIB2; NITRIDE; CRB2;
D O I：
10.1016/j.ijrmhm.2012.09.006
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Titanium diboride (TiB2) composite with MoSi2 and CrB2 has been prepared and tested to possess excellent oxidation resistance. Dense composite pellets were fabricated by hot pressing of powder mixtures. Microstructural characterization was carried out by XRD and SEM. Hardness and fracture toughness values were measured. Extensive oxidation studies of the composites were also carried out. Density of >= 96% p(th) was obtained by hot pressing at 1800 degrees C under a pressure of 35 MPa for 1 h. Hardness and fracture toughness were in the range of 18-24 GPa and 35-4 MPa.m(1/2) respectively. Crack branching, deflection and bridging mechanisms were observed in the crack propagation paths. Isothermal and continuous oxidation studies of these composites up to 1000 degrees C showed improved oxidation resistance with the formation of protective glassy layer. TiO2, Cr2O3 and SiO2 phases were identified on the oxidized surface. Diffusion controlled mechanism of oxidation was observed in the composites. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：243 / 253
页数：11
相关论文
共 50 条
  • [31] Combustion synthesis/densification of an Al2O3-TiB2 composite
    Meyers, MA
    Olevsky, EA
    Ma, J
    Jamet, M
    MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2001, 311 (1-2): : 83 - 99
  • [32] Understanding the oxidation behavior of a ZrB2-MoSi2 composite at ultra-high temperatures
    Silvestroni, Laura
    Stricker, Kerstin
    Sciti, Diletta
    Kleebe, Hans-Joachim
    ACTA MATERIALIA, 2018, 151 : 216 - 228
  • [33] Densification, Microstructural Evolution, Mechanical Properties and Oxidation Study of CrB2 + EuB6 Composite
    K. Raju
    J. K. Sonber
    T. S. R. Ch. Murthy
    K. Sairam
    S. Majumdar
    V. Kain
    G. V. S. Nageswar Rao
    Journal of Materials Engineering and Performance, 2018, 27 : 2457 - 2465
  • [34] OXIDATION OF MONOLITHIC TIB2 AND OF AL2O3-TIB2 COMPOSITE
    TAMPIERI, A
    BELLOSI, A
    JOURNAL OF MATERIALS SCIENCE, 1993, 28 (03) : 649 - 653
  • [35] Densification, Microstructural Evolution, Mechanical Properties and Oxidation Study of CrB2 + EuB6 Composite
    Raju, K.
    Sonber, J. K.
    Murthy, T. S. R. Ch.
    Sairam, K.
    Majumdar, S.
    Kain, V.
    Rao, G. V. S. Nageswar
    JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE, 2018, 27 (05) : 2457 - 2465
  • [36] Densification, characterization and oxidation studies of (TiCr)B2+20% MoSi2
    Murthy, T. S. R. Ch.
    Sonber, J. K.
    Subramanian, C.
    Hubli, R. C.
    Krishnamurthy, N.
    Suri, A. K.
    INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, 2013, 37 : 12 - 28
  • [37] SINTERING AND OXIDATION OF Ti(C, N)-TiB2-MoSi2 COMPOSITES.
    Shobu, Kazuhisa
    Watanabe, Tadahiko
    Yogyo Kyokai Shi/Journal of the Ceramic Society of Japan, 1987, 95 (10): : 991 - 999
  • [38] Oxidation Kinetics and Mechanisms of Hot-Pressed TiB2-MoSi2 Composites
    Raju, Golla Brahma
    Basu, Bikramjit
    Suri, Ashok Kumar
    JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2008, 91 (10) : 3320 - 3327
  • [39] Oxidation of MoSi2/SiC nanolayered composite
    Hirvonen, JP
    Torri, P
    Lappalainen, R
    Likonen, J
    Kung, H
    Jervis, JR
    Nastasi, M
    JOURNAL OF MATERIALS RESEARCH, 1998, 13 (04) : 965 - 973
  • [40] Oxidation behavior of AlMgB14-TiB2 composite at elevated temperature
    Lei, Yu
    Meng, Qing-sen
    Zhuang, Lei
    Chen, Shao-ping
    Dai, Jing-jie
    APPLIED SURFACE SCIENCE, 2015, 347 : 155 - 161
12345