铍中铁铝杂质对铍材性能的影响

综述了铍中不同存在形式的铁、铝杂质对铍材性能的影响。指出 ,通过合适的时效热处理 ,使铍中的铁、铝结合生成AlFeBe4化合物 ,可改善铍材性能。分析并阐明了适宜的Fe/Al比为生成AlFeBe4化合物的必要条件 ,并介绍了通过选取铍珠或控制粉末酸处理浓度 ,制备符合此Fe/Al比要求的铍材原料的方法。

冲击研磨铍粉及其材料性能

比较了冲击研磨制铍粉和传统的圆盘磨铍粉，结果发现：冲击研磨铍粉，具有粒度分布范围窄，颗粒近球形，氧含量低等优点。用该种粉末制备的铍材，无论是热压还是等静压铍材，其力学性能和性能的各向同性均得到全面改善。

铍中铁铝杂质对铍材性能的影响

综述了铍中不同存在形式的铁铝杂质对铍材性能的影响，指出通过合适的时效热处理使铁、铝结合生成AlFeBe4化合物可改善铍材性能。探明了适宜的铁／铝比是生成AlFeBe4化合物的必要条件，并通过选取铍珠或控制粉末酸处理浓度，能制备出符合此铁／铝比要求的原料。

Influence of grain size on mechanical properties of isostatically pressed beryllium materials

Six kinds of beryllium powders with different particle sizes (4～15 μm) and low oxygen prepared by impact grinding were compacted and consolidated by cold hot isostatic pressing (CIP HIP). The tensile strength, yield strength, elongation and micro yield strength(MYS) of the materials were tested and it showed that the strength of the materials, especially the yield strength and micro yield strength(MYS) increase obviously with the refinement of grain size. From the XRD and TEM, the second phase is BeO which is finely dispersed in matrix. This is considered to be the main strengthening mechanism for CIP HIPed beryllium materials with higher purity.

新强8号水稻麦茬机直播高产栽培技术

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