Al2 O3,Al3Ti/Al in situ aluminum matrix composite material was prepared by means of XD( exothermic dispersion) synthesis technique.Itskinetic mechanism was also discussed.The results showed that the Al- Ti O2 system can reactin a very shorttime.The reaction was propagated in com- bustion wave.It wasalso shown thataluminum initially reacted with Ti O2 to form Al2 O3and reduced Ti.The Al2 O3and Al3Titook the shape ofequalaxialparticle and block respectively.A certain heat- ing rate and content of aluminu...
【基金】
江苏省自然科学基金项目 ( BK2 0 0 0 0 0 0 3)
【分类号】
TB331
【正文快照】
XD( Exothermic Dispersion)热扩散反应法是在SHS( Self- propagating High Temperature Synthesis)法的基础上发展而来 ,是将需进行合成的组分原料充分混合后 ,挤压成坯 ,置于真空炉中 ,以一定的升温速度加热至一定温度时压坯自行爆燃 ,反应放热又使未反应的部分相继反应 ,燃?
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