Hot isostatic pressing (HIP) has been proposed for manufacturing large hexagonal TiBe₁₂ blocks for neutron multiplication in the new reference design of the DEMO blanket. This paper investigates the effect of HIP at 800 and 900 °C on the microstructure and the properties of extruded Be-Ti composites with the main aim of optimizing HIP parameters. Be-Ti composites produced by powder extrusion at 650 °C consist exclusively of Be and Ti phases. During HIP, they interact forming titanium beryllides with a volume fraction of 70–79%. These beryllides have a very high microhardness of 1130–1680 HV.

X-ray diffraction showed that the main beryllide phase is TiBe₁₂. After HIP at 900 °C, it has a very fine-grained microstructure with a mean grain size of 190 nm. Auger electron spectroscopy revealed that the TiBe₂ beryllide forms a thin layer surrounding the remaining Ti phase. Ti₂Be₁₇ can be found at the prior titanium phase locations in the form of small particles. The titanium and beryllium phase do not dissolve completely during the used HIP process. In addition, the beryllium phase exhibited a higher porosity after HIP. This results in densities as low as 94.4% and 95.9% of the theoretical density of TiBe₁₂ after heat treatment at 800 °C and 900 °C, respectively.

Differential scanning calorimetry showed that beryllides are mainly synthesized in the temperature range of 670–740 °C, which can be monitored by the observation of a heat release. To accomplish diffusion processes in the Be-Ti composite, HIP should be carried out at temperatures exceeding 900 °C. Heating rates should be less than 10 K/min to avoid excessive overheating.

在DEMO橡皮布的新参考设计中，已建议使用热等静压（HIP）来制造用于中子倍增的大型六角形TiBe ₁₂块。本文研究了在800和900°C下HIP对挤出的Be-Ti复合材料的组织和性能的影响，其主要目的是优化HIP参数。在650°C下通过粉末挤压生产的Be-Ti复合材料仅由Be和Ti相组成。在HIP期间，它们相互作用形成铍化钛，其体积分数为70-79％。这些铍化物具有1130–1680 HV的非常高的显微硬度。

X射线衍射表明，主要的铍化物相是TiBe ₁₂。经过900°C的HIP处理后，它具有非常细的微观结构，平均晶粒尺寸为190 nm。俄歇电子能谱显示，TiBe ₂铍形成围绕剩余Ti相的薄层。Ti ₂ Be ₁₇可以以小颗粒的形式出现在先前的钛相位置。在使用的HIP工艺过程中，钛和铍相不会完全溶解。此外，HIP后铍相显示出较高的孔隙率。在800°C和900°C热处理后，其密度分别低至TiBe ₁₂理论密度的94.4％和95.9％。

差示扫描量热法显示，铍化物主要是在670–740°C的温度范围内合成的，可以通过观察放热来监测。为了完成Be-Ti复合材料中的扩散过程，HIP应在超过900°C的温度下进行。加热速率应小于10 K / min，以避免过度过热。