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首页> 外文期刊>Journal of Materials Research >Scandium on the formation of in situ TiB_2 particulates in an aluminum matrix
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Scandium on the formation of in situ TiB_2 particulates in an aluminum matrix

机译：dium对铝基体中原位TiB_2颗粒形成的影响

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摘要

TiB2 particulates were formed in situ in an aluminum matrix via chemical reactions between an aluminum melt and the mixture of K2TiF6 and KBF4 salts. Different effects of Sc addition on the formation of the TiB2 particulates were revealed depending on the participation of Sc at different stages of the formation of the particulates. The metal-salt reactions resulted in boride layers along the -Al grain boundaries in the presence of Sc, while the addition of Sc after the metal-salt reactions broke up the boride layers improving the dispersion of the TiB2 particulates to a limited degree. Sc promoted the growth of the TiB2 particulates, resulting in the coarsening of TiB2 particulates. The participation of Sc in the formation of TiB2 particulates altered the coarsening of the TiB2 particulates, resulting in different morphologies of the TiB2 particulates depending on the participation of Sc in the formation of the TiB2 particulates at different stages.
机译：TiB2微粒是通过铝熔体与K2TiF6和KBF4盐的混合物之间的化学反应在铝基质中原位形成的。揭示了Sc添加对TiB2颗粒形成的不同影响，这取决于Sc在颗粒形成的不同阶段的参与。在存在Sc的情况下，金属盐反应会导致沿-Al晶界的硼化物层，而在金属盐反应后添加Sc会破坏硼化物层，从而在一定程度上改善了TiB2颗粒的分散性。 Sc促进了TiB2颗粒的生长，导致TiB2颗粒的粗化。 Sc参与TiB2颗粒的形成改变了TiB2颗粒的粗化，导致TiB2颗粒的形态不同，这取决于Sc在不同阶段参与TiB2颗粒的形成。

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