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采用X射线衍射和红外光谱法,对磨料的成分进行了分析。结果表明:磨料中含有金刚石和三聚氰胺甲醛树脂。再采用热处理方法,对磨料中三聚氰脂甲醛树脂进行定量分析。方法简单易行,合理可靠,能够准确测定磨料中的成分。 相似文献
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本文采用粉末X射线衍射法,利用“POWD12”粉末衍射计算程序对3CAS,3SAC,3CA(C,B)胶凝材料进行晶体结构研究,得出以下结果:3CAS,3SAC,3CA(C,B)属兰方石型结构;其空间群为Ⅰ_(43)m;其结构因子残差R值均小于0.1。并获得每种化合物的原子坐标及晶胞常数。 相似文献
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综述了近几年来纳米陶瓷摩擦复合材料的制备方法、特性和摩擦性能的研究进展.并对纳米陶瓷摩擦复合材料的应用研究和发展前景进行了展望. 相似文献
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秦麟卿 《武汉理工大学学报(材料科学英文版)》2009,24(5):763-767
Flame retardant epoxy resins were prepared by a simple mixed method using ammonium aluminum carbonate hydroxy hydrate (AACHH)
as a halogen-free flame retardant. The prepared samples were characterized by X-ray diffraction, thermogravimetric and differential
scanning calorimetry, scanning electron microscope and limiting oxygen index(LOI) experiments. Effects of AACHH content on
LOI of epoxy resins/AACHH composite and flame retardant mechanism were investigated and discussed. Results show that AACHH
exhibites excellent flame-retardant properties in epoxy resin(EP). When the content of AACHH was 47.4%, the LOI of EP reached
32.2%. Moreover, the initial and terminal decomposition temperature of EP increased by 48°C and 40 °C, respectively. The flame
retarded mechanism of AACHH is due to the synergic flame retardant effects of diluting, cooling, decomposition resisting and
obstructing. 相似文献
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α-Al2O3颗粒形貌对其坯体烧结性能的影响 总被引:1,自引:0,他引:1
通过对α-Al2O3颗粒形貌及其烧结体断面显微结构的分析,以及坯体的线收缩率、密度和吸水率的测定,研究了α-Al2O3颗粒形貌对坯体烧结性能的影响。结果表明:坯体在高温下产生的膨胀,对坯体的烧结致密和均匀显微结构的形成,产生了持续的不利影响。α-Al2O3颗粒形貌对坯体烧结性能产生不同程度的影响。 相似文献
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