ZrC ceramics were prepared by mechanical axial compression of self-propagating high-temperature synthesis/single action pressing (SHS/SAP).The effects of pressure on microstructure and densification of the products, as well as the relationship between displacement/variation of the load curve and SHS reaction, were studied.The structure and properties of the products were investigated by XRD and SEM.In addition, the density was measured by the drain away liquid method.Meanwhile, universal testing machine was used to record the displacement and load curve alternations.The results indicate that products are mainly composed of ZrC phase, the process of exhaust are accelerated as the increasing of pressure as well, leading to the smaller size of porosity and crystal particles.Density manifested as an increasing pattern by the elevated pressure with no longer change at 80 MPa.Due to the strong attenuation of pressure at the peak of temperature, the density of the production is only 65.7% in 120 MPa.The end point of the SHS reaction and the plastic time of the products can be monitored by displacement and load curve.The results provide evidence for the application of self-propagating high-temperature synthesis/pseudo-hot isostatic pressing to further improve the density of ceramics.
ZHANG X , HILMAS G E , FAHRENHOLTS W G , et al. Hot pressing of tantalum carbide with and without sintering additives[J]. J Am Ceram Soc, 2007, 90 (2): 393- 401.
doi: 10.1111/jace.2007.90.issue-2
2
LIU J X , KAN Y M , ZHANG G J . Synthesis of ultra-fine hafnium carbide powder and its pressureless sintering[J]. J Am Ceram Soc, 2010, 93 (4): 980- 986.
doi: 10.1111/jace.2010.93.issue-4
LI X Q , JIAO J , QIU H P , et al. Preparation and performance of ZrC/SiC multi-components modified C/C composites[J]. Journal of Aeronautical Materials, 2014, 34 (3): 69- 73.
4
MA B X , HAN W B . Thermal shock resistance of ZrC matrix ceramics[J]. J Refract Met Hard Mat, 2010, 28 (2): 187- 190.
doi: 10.1016/j.ijrmhm.2009.09.001
ZHANG X , CHEN Z K , XIONG X . Preparation and high-temperature sintering mechanism of ZrB2 ceramic composite coatings for C/C-SiC composites[J]. Journal of Materials Engineering, 2015, 43 (3): 1- 6.
6
ZHAO L Y , JIA D C , WANG Y J , et al. ZrC-ZrB2 matrix composites with enhanced toughness prepared by reactive hot pressing[J]. Set Mater, 2010, 63 (8): 887- 890.
7
WANG X G , GUO W M , KAN Y M , et al. Densification behavior and properties of hot-pressed ZrC ceramics with Zr and graphite additives[J]. J Eur Ceram Soc, 2011, 31 (6): 1103- 1111.
doi: 10.1016/j.jeurceramsoc.2011.01.005
8
NOBUHIRO S . Simultaneous synthesis and forming of Ti-B system by self-propagating reaction[J]. The Ceramic Society of Japan, 1987, 95 (2): 243- 247.
9
YANAGISAWA N, SATA N, SANADA N.Fabrication of TiB2-Cu functionally gradient material by SHS process[C]//YAMANOUCHI M.Proc 1st US-Japanese Workshop on Combustion Synthesis.Tokyo:National Research Institute for Metals, 1990.
10
ZAVITSANOS P.The use of self-propagating high-temperature synthesis of high-density titanium diboride[C]//MUNIR Z A.Combustion and Plasma Synthesis of High-temperature Materials.New York:VCH Publisher, 1990.
11
殷声. 燃烧合成[M]. 北京: 冶金工业出版社, 1999.
11
YIN S . Combustion Synthesis[M]. Beijing: Metallurgical Industry Press, 1999.
SONG M S.Investigation of the formation process and growth kinetics of combustion synthesized TiC and ZrC crystals[D].Shanghai:Shanghai Jiao Tong University, 2009.
13
MERZHANOV A G.Self-propagating high-temperature synthesis:twenty years of search and findings[C]//MUNIR Z A.Combustion and Plasma Synthesis of High-temperature Materials.New York:VCH Publisher, 1990.
14
傅正义, 袁润章, MUNIRZ A. 原料粒度及组成对TiB2-xAl复合体系的SHS合成过程影响[J]. 复合材料学报, 1994, 11 (2): 91.
14
FU Z Y , YUAN R Z , MUNIR Z A . Effect of composition and raw materials particle size on SHS of TiB2-xAl composite system[J]. Acta Materiae Compositae Sinica, 1994, 11 (2): 91.
LI C.Study on SHS/PHIP prepared technology and the properties and applications of Ti3A1C2 ceramics material[D].Harbin:Harbin Institute of Technology, 2007.
ZHU C C , LIN H , LI C , et al. Orthogonal optimization of process parameter during TiC-TiB2/Cu cermets combustion synthesis[J]. Journal of Natural Science of Heilongjiang University, 2007, 24 (3): 331- 335.
WANG J L , ZHANG G S , ZHU Y G , et al. Densification factors of Cf/TiC-TiB2 ceramic composites by combustion synthesis[J]. Powder Metallurgy Technology, 2008, 26 (1): 33- 36.
2017, Vol. 45 
), 侯根良1, 史子良1, 钟长荣1, 邢亚坤2
