Abstract

The technology of obtaining composite material experimental samples based on an intermetallic alloy of VKNA type reinforced with oxide particles in an amount of 2–5 vol % is presented. An intermetallic VKNA-1V alloy containing 80–90 wt % of γ' phase was used as the matrix prototype. Al₂O₃ particles, as well as complex oxides AI₂O₃⋅Y₂O₃, AI₂O₃⋅Y₂O₃⋅HfO₂, were used as reinforcing particles. Granules of VKNA-1V alloy were obtained by gas atomization at the Hermiga Gas Atomiser. Subsequently, these granules were subjected to mechanical alloying with the aim of introducing particles of the aforementioned compositions of oxides to form a composite mixture corresponding in composition to the desired composite material. Experimental composite material samples with different contents of reinforcing particles were obtained from powder mixtures by spark plasma sintering (SPS) with further hot isostatic pressing (HIP). To study the microstructure of experimental samples, the method of scanning electron microscopy was used. Time to failure of experimental samples sintered by spark plasma combined with HIP was determined at a temperature of 900°С and stress of 50, 45, and 35 MPa. It is shown that to determine the areas of application of the developed composition, the hot isostatic pressing operation is necessary, but not sufficient.

中文翻译：

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氧化物颗粒增强的VKNA型金属间合金基复合材料

摘要

提出了一种基于VKNA型金属间合金的复合材料实验样品的获得技术，该合金以2-5％（体积）的氧化物颗粒增强。包含80-90 wt％γ'相的金属间VKNA-1V合金用作基质原型。的Al ₂ Ó ₃颗粒，以及复合氧化物AI ₂ ö ₃ ⋅Y ₂ ö ₃，AI ₂ ö ₃ ⋅Y ₂ ö ₃ ⋅HfO ₂用作增强颗粒。在Hermiga气体雾化器中通过气体雾化获得VKNA-1V合金颗粒。随后，将这些颗粒进行机械合金化，目的是引入上述氧化物组成的颗粒，以形成组成上与所需复合材料相对应的复合混合物。通过火花等离子体烧结（SPS）和进一步的热等静压（HIP）从粉末混合物中获得了具有不同含量的增强颗粒的实验复合材料样品。为了研究实验样品的微观结构，使用了扫描电子显微镜的方法。在900°C的温度和50、45和35 MPa的应力下，测定了用电火花等离子体结合HIP烧结的实验样品的失效时间。