Influences of Strontium Addition and Whisker Content on Solidification Behavior of SiCw/Al-18Si Metal Matrix Composites

Influences of Strontium Addition and Whisker Content on Solidification Behavior of SiCw/Al-18Si Metal Matrix Composites
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锶添加量和晶须含量对SiCw/Al-18Si金属基复合材料凝固行为的影响

DOI:
10.4028/www.scientific.net/amr.15-17.251
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发表时间:
2006-02
期刊:
Advanced Materials Research
影响因子:
--
通讯作者:
H.M.Wei
H.M.Wei
中科院分区:
其他
文献类型:
--
作者:
X.X.Zhang;L.Geng;H.M.Wei

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采用扫描电镜(SEM)、透射电镜(TEM)和差示扫描量热仪(DSC)研究了SiCw/Al-18Si金属基复合材料(MMCs)的凝固行为,揭示了锶添加量和晶须含量对其凝固行为的影响。结果表明:硅相在SiC晶须表面不成核;随着SiC晶须含量的增加,初生Si的凝固起始时间和峰值温度降低。Sr的加入降低了初生Si的凝固起始温度和峰值温度,减小了初生Si的尺寸。晶须含量对未添加Sr的原生Si的凝固起始温度和峰值温度的影响大于添加Sr的原生Si。晶须含量和Sr含量对共晶凝固起始温度和峰值温度影响不大。
Solidification behavior of SiCw/Al-18Si metal matrix composites (MMCs) was studied by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and differential scanning calorimeter (DSC) in order to reveal the effects of strontium addition and whisker content. The results show that the Si phase does not nucleate on SiC whisker surface. With the increasing of SiC whisker content, solidification onset and peak temperatures of primary Si decrease. Sr addition lowers solidification onset and peak temperatures of primary Si, and reduces its size. Whisker content has larger effects on solidification onset and peak temperatures of primary Si without Sr addition than that of primary Si with Sr addition.But solidification onset and peak temperatures of eutectic are barely affected by whisker content and Sr addition.
DOI: 10.1016/s0924-0136(96)02643-x
发表时间: 1997
影响因子: 6.3
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