Ceramic Whiskers Formation

陶瓷越来越多地用于结构应用， 其高温稳定性和高硬度。 不幸的是大多数 陶瓷非常脆并且具有低的断裂韧性值。 提高结构陶瓷材料韧性的一种方法是 制备以陶瓷晶须为增强填料的复合材料。 的 目前生产这些填料的方法相当昂贵。 的 P.I.提出了一种制备β-赛隆纤维的简单新方法， SiO2/C/Na 3AlF 6混合熔体在流动的氮气中。 拟议 研究将致力于β-赛隆晶须的产率和结构， 反应机理和最佳工艺条件。

Ceramics are used increasingly for structural applications in view of their high temperature stability and high hardness. Unfortunately most ceramics are very brittle and possess low fracture toughness values. One way to increase the toughness of structural ceramic materials is to prepare composites with ceramic whiskers as reinforcing fillers. The methods for producing these fillers currently are rather expensive. The P.I. proposes a simple new method of producing Beta-sialon fiber in SiO2/C/Na3 AIF6 mixed melt in flowing nitrogen gas. The proposed research will address the yield and structure of Beta-sialon whiskers, reaction mechanism and optimum processing conditions.