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首页> 外文期刊>Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing >Spark plasma sintering and deformation of Ti-TiB_2 composites
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Spark plasma sintering and deformation of Ti-TiB_2 composites

机译：火花等离子体烧结和Ti-TiB_2复合材料的形变

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摘要

Spark plasma sintering (SPS) was used to investigate the densification and deformation behaviour of Ti-TiB_2 composites. Fully densified samples were prepared with Ti addition larger than 5%. The prepared composites can be deformed under compression at 1700 ℃ to achieve a strain of 50% without cracking. At lower temperatures, cracks were initiated due to low ductility of TiB_2 and low content of Ti. During the sintering and deformation, TiB is formed via a reaction between Ti and TiB_2. To elucidate the formation mechanism of TiB in the SPS process, reactive sintering of TiB using element precursors was also performed. Fully dense samples were prepared but it was not possible to prepare pure uniphase TiB. The reactive sintering resulted in the formation of TiB and TiB_2 mixtures at low temperatures and a mixture of TiB_2 and Ti_3B_4 at high temperature.
机译：火花等离子体烧结（SPS）用于研究Ti-TiB_2复合材料的致密化和变形行为。制备了完全致密的样品，其中Ti添加量大于5％。所制备的复合材料可在1700℃的压缩条件下变形，以达到50％的应变而不会破裂。在较低的温度下，由于TiB_2的延展性低和Ti的含量低而引发了裂纹。在烧结和变形过程中，TiB是通过Ti和TiB_2之间的反应形成的。为了阐明SPS工艺中TiB的形成机理，还进行了使用元素前体的TiB反应烧结。制备了完全致密的样品，但无法制备纯单相TiB。反应烧结导致在低温下形成TiB和TiB_2混合物，在高温下形成TiB_2和Ti_3B_4的混合物。

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