Plasma preparation and low-temperature sintering of spherical TiC–Fe composite powder |
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基金项目: | This work was financially supported by the National Natural Science Foundation of China;the Research Fund for the Doctoral Program of Higher Education of China |
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摘 要: | A spherical Fe matrix composite powder containing a high volume fraction (82vol%) of fine TiC reinforcement was produced us-ing a novel process combining in situ synthesis and plasma techniques. The composite powder exhibited good sphericity and a dense struc-ture, and the fine sub-micron TiC particles were homogeneously distributed in theα-Fe matrix. A TiC–Fe cermet was prepared from the as-prepared spherical composite powder using powder metallurgy at a low sintering temperature;the product exhibited a hardness of HRA 88.5 and a flexural strength of 1360 MPa. The grain size of the fine-grained TiC and special surface structure of the spherical powder played the key roles in the fabrication process.
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关 键 词: | powder technology cermets radio frequency plasma sintering numerical simulation |
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