This article provides a review of current research activities that concentrate on Ti3SiC2. We begin with an overview of the crystal and electronic structures, which are the basis to understand this material. Following...This article provides a review of current research activities that concentrate on Ti3SiC2. We begin with an overview of the crystal and electronic structures, which are the basis to understand this material. Followings are the synthetic strategies that have been exploited to achieve, and the formation mechanism of Ti3SiC2. Then we devote much attentions to the mechanical properties and oxidation/hot corrosion behaviors of Ti3SiC2 as well as some advances achieved recently. At the end of this paper, we elaborate on some new discoveries in the Ti3SiC2 system, and also give a brief discussion focused on the ＂microstructure -property＂ relationship.展开更多
SiC粉体表面SiO_(2)氧化层对其浆料粘度、流变性产生的影响一直是胶态成型技术关注的问题。采用NaOH、KOH和Na_(2)CO_(3)三种不同强度的碱性溶液对SiC粉体进行处理,考察碱性溶液对SiO_(2)氧化层的活化以及对粉体分散稳定性产生的影响。Z...SiC粉体表面SiO_(2)氧化层对其浆料粘度、流变性产生的影响一直是胶态成型技术关注的问题。采用NaOH、KOH和Na_(2)CO_(3)三种不同强度的碱性溶液对SiC粉体进行处理,考察碱性溶液对SiO_(2)氧化层的活化以及对粉体分散稳定性产生的影响。Zeta电位测试表明,中性时Na_(2)CO_(3)处理后粉体表面的电位绝对值比酸洗粉体提高了16.8 mV,pH值为10时达到67.8 m V。所制备固相含量为35 vol%的浆料,粘度低、稳定性好。因此,适度活化SiC粉体表面氧化层有助于改善浆料的流变性能。展开更多
基金supported by the National Outstanding Young Scientist Foundation for Y.C. Zhou under Grant No. 59925208the National Natural Science Foundation of China under Grants No. 50232040, No. 50302011 and No. 90403027"863" Project,and High-Tech Bureau of the Chinese Academy of Sciences
文摘This article provides a review of current research activities that concentrate on Ti3SiC2. We begin with an overview of the crystal and electronic structures, which are the basis to understand this material. Followings are the synthetic strategies that have been exploited to achieve, and the formation mechanism of Ti3SiC2. Then we devote much attentions to the mechanical properties and oxidation/hot corrosion behaviors of Ti3SiC2 as well as some advances achieved recently. At the end of this paper, we elaborate on some new discoveries in the Ti3SiC2 system, and also give a brief discussion focused on the ＂microstructure -property＂ relationship.
文摘SiC粉体表面SiO_(2)氧化层对其浆料粘度、流变性产生的影响一直是胶态成型技术关注的问题。采用NaOH、KOH和Na_(2)CO_(3)三种不同强度的碱性溶液对SiC粉体进行处理,考察碱性溶液对SiO_(2)氧化层的活化以及对粉体分散稳定性产生的影响。Zeta电位测试表明,中性时Na_(2)CO_(3)处理后粉体表面的电位绝对值比酸洗粉体提高了16.8 mV,pH值为10时达到67.8 m V。所制备固相含量为35 vol%的浆料,粘度低、稳定性好。因此,适度活化SiC粉体表面氧化层有助于改善浆料的流变性能。
