及其微觀組織
(佳木斯大學(xué) 材料學(xué)院， 佳木斯 154007)
摘 要: 采用直接加入TiC粉的方法制備了原位自生TiC增強鈦基復(fù)合材料， 此法與國內(nèi)研究者常用的加入石墨粉的方法相比， 制備的復(fù)合材料成分準(zhǔn)確， 易于控制。 制備的復(fù)合材料由Ti和TiC相組成， 其中TiC為初生樹枝狀和短棒狀共晶組成。 TEM研究發(fā)現(xiàn)： 還存在0.3~0.6μm的規(guī)則塊狀TiC， 多分布在晶界上； TiC顆粒與基體界面干凈、無反應(yīng)層， 基體中存在較多的位錯， 且位錯線上存在析出物。
關(guān)鍵字: 自生復(fù)合材料; 鈦合金; 制備; TiC形貌; 組織
（Materials College, Jiamusi University, Jiamusi 154007, China）
Abstract:The in-situ TiC particles reinforced Ti-based composite was fabricated by direct addition of TiC power. Using this way the composition of composite is accurate and controllable than direct addition of C power during fabricating composite. The composite consists of Ti and TiC phases, among them the dendrite TiC and short-bar shape TiC are primary and eutectic phases respectively. TEM observe results indicate that there also have blocky TiC with size of 0.3~0.6μm and they distribute at grain boundary. The interface between TiC particle and matrix is clear and with no reaction existing. At the mean time, a number of dislocations can be found in the matrix and carbides precipitate from dislocations line.
Key words: In-situ composite; titanium alloy; fabrication; TiC morphology; microstructure
