Sialon tool materials
Sialon tool materials
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赛隆刀具材料
DOI：
10.1179/030716982803285639
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发表时间：
1982
期刊：
影响因子：
--
通讯作者：
K. Jack
中科院分区：
文献类型：
--
作者：
K. Jack
赛隆（Sialons）是Si - Al - O - N及相关体系中的相，由(Si, Al)(O, N)₄四面体构成，就像硅酸盐中的结构单元是(Si, Al)O₄四面体一样。这些新材料包括含氮陶瓷、玻璃和微晶玻璃，但到目前为止，只有β’ - 赛隆，即与β - 氮化硅（Si₃N₄）同构的硅铝氧氮化物，被商业开发用于工程应用。通过添加氧化钇进行无压烧结来制造完全致密的形状，可得到已知最强的陶瓷，并且该产品作为金属加工的切削工具具有很大的应用前景。由于其高硬度、冲击强度和断裂韧性，钇 - 赛隆刀具在许多切削应用中优于钴结合的碳化钨（硬质合金）。
Sialons are phases in the Si–Al–Q–N and related systems that are built up of (Si, Al)(O, N)4 tetrahedra in the same way that the structural unit in the silicates is the (Si, Al)O4 tetrahedron. These new materials include nitrogen-containing ceramics, glasses, and glass-ceramics but only β’-sialon, the silicon-aluminium oxynitride isostructural with β-silicon nitride, Si3N4, has so far been commercially developed for engineering applications. Fully dense shapes are fabricated by pressureless sintering with additions of yttrium oxide to give the strongest ceramic yet known and the product holds great promise as a cutting tool for machining metals. Because of its high hardness, impact strength, and fracture toughness yttrium-sialon tool tips are superior to cobalt-bonded tungsten carbide (hardmetal) for many cutting applications.