电场诱导Fe-Ti-C系燃烧合成:电流对合成产物的影响

Combustion Synthesis of Fe-Ti-C System by Electric Field Inducement:Effect of Electric Current on the Synthesis Products

采用Gleeble-1500D热模拟试验机,利用电场诱导Fe-Ti-C体系发生燃烧合成反应,并研究了外加电流对合成产物的影响。对产物进行了X射线衍射(XRD)和扫描电镜(SEM)等分析。结果表明:产物中均存在TiC相,而少量的Fe2Ti相仅存在于特定的阶段;随着外加电流的增加,颗粒的平均尺寸也发生不同程度的减小。外加电场能够促进反应物粒子的固相扩散和形核长大,并最终影响合成产物的物相组成和颗粒尺寸。

The reaction of combustion synthesis was occurred by electric field inducement for Fe-Ti-C system by using Gleeble-1500D thermal simulation apparatus, and the effect of electric field on the synthetical products was researched by X-ray diffraction （XRD） and scanning electron microscope （SEM）. The results show that there were TiC phase in all the products, but Fe2Ti phase only in the special stage, with the current increasing, the particle size of synthesis products decreases in different extents. Through the investigation and analysis, the conclusion is obtained that the applied electric field can promote the nuclear formation and growth of reactant particle by solid diffusion, and ultimately influencing the phase composition and particle size of synthesis products.