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
  • [1] Densification and mechanical properties of CrB2+MoSi2 based novel composites
    Reddy, Vidhyasagar
    Sonber, J. K.
    Sairam, K.
    Murthy, T. S. R. Ch.
    Kumar, Shankar
    Rao, G. V. S. Nageswara
    Rao, T. Srinivasa
    Chakravartty, J. K.
    CERAMICS INTERNATIONAL, 2015, 41 (06) : 7611 - 7617
  • [2] Effect of CrB2 addition on densification, properties and oxidation resistance of TiB2
    Murthy, T. S. R. Ch.
    Sonber, J. K.
    Subramanian, C.
    Fotedar, R. K.
    Gonal, M. R.
    Suri, A. K.
    INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, 2009, 27 (06): : 976 - 984
  • [3] OXIDATION RESISTANCE OF TIB2-TIC-CRB COMPOSITE
    MATSUSHITA, J
    NAGASHIMA, H
    SAITO, H
    NIPPON SERAMIKKUSU KYOKAI GAKUJUTSU RONBUNSHI-JOURNAL OF THE CERAMIC SOCIETY OF JAPAN, 1990, 98 (10): : 1172 - 1175
  • [4] Densification, characterization and oxidation studies of TiB2-WSi2 composite
    Murthy, T. S. R. Ch.
    Sonber, J. K.
    Subramanian, C.
    Hubli, R. C.
    Suri, A. K.
    INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, 2012, 33 : 10 - 21
  • [5] A TEM study on TiB2-20%MoSi2 composite:: Microstructure development and densification mechanism
    Biswas, K
    Basu, B
    Suri, AK
    Chattopadhyay, K
    SCRIPTA MATERIALIA, 2006, 54 (07) : 1363 - 1368
  • [6] Thermal stability of MoSi2-TiB2-CrB2 composites at 900–1400°C
    L. P. Efimenko
    M. V. Sazonova
    K. E. Pugachev
    I. G. Polyakova
    Glass Physics and Chemistry, 2013, 39 : 208 - 220
  • [7] Oxidation of monolithic TiB2 and TiB2-20 wt.% MOSi2 composite at 850°C
    Murthy, TSRC
    Balasubramaniam, R
    Basu, B
    Suri, AK
    Mungole, MN
    JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2006, 26 (1-2) : 187 - 192
  • [8] A new TiB2 + CrSi2 composite - Densification, characterization and oxidation studies
    Murthy, T. S. R. Ch.
    Sonber, J. K.
    Subramanian, C.
    Fotedar, R. K.
    Kumar, Sunil
    Gonal, M. R.
    Suri, A. K.
    INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS, 2010, 28 (04): : 529 - 540
  • [9] Thermal stability of MoSi2-TiB2-CrB2 composites at 900-1400A°C
    Efimenko, L. P.
    Sazonova, M. V.
    Pugachev, K. E.
    Polyakova, I. G.
    GLASS PHYSICS AND CHEMISTRY, 2013, 39 (02) : 208 - 220
  • [10] Rare earth-doped ZrB2-MoSi2 ceramics: Densification and oxidation behavior
    Silvestroni, Laura
    Liu, Hai-Tao
    Sciti, Diletta
    Wang, Xin-Gang
    Zhang, Guo-Jun
    JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2025, 45 (03)
12345