以3TiO2+3C+(4+x)Al为反应体系,用电场激发燃烧合成技术并使用合成中形成的液态Al对产物的渗透作用,制备出致密度为92.5%的Al2O3-TiC-Al复合材料,采用燃烧波峰淬熄法研究了原位合成Al2O3-TiC-Al复合材料的结构形成机理.结果表明:电场提供的焦耳效应可提高体系的绝热燃烧温度,从而可突破该体系只能在x<10 mol下发生SHS反应的热力学限制;在Al2O3-TiC-Al复合材料动力学过程中,首先Al粉熔融,进而加速与TiO2的反应生成Al2O3;然后Al与TiO2反应还原出Ti并与C反应生成TiC;液态Al的渗透将Al2O3和TiC颗粒粘结起来,形成致密的复合材料组织.
参考文献
[1] | Y.C.Yi,J.J.Moore,Self-propagating high-temperature synthesis (SHS) of powder compacted materials,J.Mater.Sci.,25,1159 (1990) |
[2] | Z.A.Munir,Syntheisis of materials by combustion processes,TMS Fall Meeting-Proceedings,Novel Techniques in Synthesis and Processing of Advanced Materials,53(1994) |
[3] | CHEN Kexin,GE Changchun,CAO Wenbin,LI Jiangtao,Combustion synthesis (CS) of AlN-SiC solid solusiton ceramics,Chinese J.Mater.Res.,13(3),273 (1999)(陈克新,葛昌纯,曹文斌,李江涛,燃烧合成AlN-SiC固溶体陶瓷,材料研究学报,13(3),273(1999)) |
[4] | E.A.Olevsky,E.R.Strutt,M.A.Meyers,Combustion synthesis and quasi-isostatic densification of powder cermets,J.Mater.Process.Tech.,121,157(2002) |
[5] | FU Zhengyi,WANG Hao,WANG Weiming,YUAN Runzhang,TiC-xNi cermets made by SHS/QP method-Ⅱpressing process and material properties,Acta Materiae Composite Sinica,14(3),61(1997)(傅正义,王浩,王为民,袁润章,采用SHS/QP技术制备TiC-xNi金属陶瓷-Ⅱ加压工艺与材料性能,复合材料学报,14(3),61(1997)) |
[6] | Y.Choi,J.K.Lee,M.E.Mullins,Densification process of TiC-Nix composites formed by self-propagating high-temperature synthesis reaction,J.Mater.Sci.,32,1717(1997) |
[7] | D.Horvitz,I.Gotman,E.Y.Gutmanas,N.Claussen,In situ processing of dense Al2O3-Ti aluminide interpenetrating phase composites,J.Eur.Ceram.Sci.,22,947 (2002) |
[8] | H.J.Feng,J.J.Moore,D.G.Wirth,Combustion synthesis of ceramic-metal composite materials:the TiC-Al2O3-Al system,Metall.Trans.A,23,2373 (1992) |
[9] | Z.A.Munir,Reaction synthesis process:mechanism and characteristics,Metall Trans A.,23,7(1992) |
[10] | Z.A.Munir,Effect of external electric fields on the nature and properties of materials synthesized by self-propagating combustion,Mater.Sci.Eng.A,287(2),125(2000) |
[11] | S.V.Gedevanishvili,Z.A.Munir,An investigation of the combustion synthesis of MoSi2-βSiC composites through electric-field activation,Mater.Sci.Eng.A,242,1(1998) |
[12] | R.Orru,G.Cao,Z.A.Munir,Mechanistic investigation of the field-activated combustion synthesis (FACS) of titanium aluminides,Chem.Eng.Sci.,54(15~16),3349(1999) |
[13] | H.Xue,Z.A.Munir,Synthesis of AlN-SiC composites and solid solutions by field-activated self-propagating combustion,J.Eur.Ceram.Soc.,17(15~16),1787 (1997) |
[14] | I.J.Shonee,Z.A.Munir,Synthesis of MoSi2-xNb and MoSi2-yZrO2 composites by the field-activated combustion method,Mater.Sci.Eng.A,202,256(1995) |
[15] | M.Omori,Sintering,consolidation,reaction and crystal growth by the spark plasma system (SPS),Mater.Sci.Eng.A,287,183 (2000) |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%