(1. 武漢理工大學(xué) 材料復(fù)合新技術(shù)國家重點(diǎn)實(shí)驗(yàn)室, 武漢 430070;
2. 武漢理工大學(xué) 理學(xué)院， 武漢 430070)
摘 要: 采用熱壓工藝合成了Ti2AlC塊體材料。在不同溫度時(shí)， 通過X射線衍射分析了摻入不同含量TiC混合粉經(jīng)熱壓合成試樣的物相組成，并采用SEM觀察所合成試樣的顯微結(jié)構(gòu)。 結(jié)果發(fā)現(xiàn)： 完全以元素粉為原料不摻TiC的混合粉經(jīng)1 500 ℃熱壓60 min合成Ti2AlC塊體材料， 且產(chǎn)物中含有TiC和Ti3AlC2雜相； 摻入0.5 mol或1.0 mol TiC混合粉經(jīng)1 400 ℃熱壓60 min后合成不含TiC且只含少量Ti3AlC2的Ti2AlC塊體材料。同時(shí)， 探討了TiC對合成Ti2AlC塊體材料的影響機(jī)理。
關(guān)鍵字: 熱壓； 碳化鋁鈦； 碳化鈦
by hot pressing
ZHOU Wei-bing
（ 1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China;
2. School of Science, Wuhan University of Technology, Wuhan 430070, China）
Abstract: Ti2AlC bulk materials were synthesized by hot pressing mixture powders with different contents of TiC addition. X-ray diffractrometry was used to detect the phase composition and scanning electron microscopy (SEM) was used to investigate the microstructures of samples synthesized at different temperatures. The results show that Ti2AlC bulk materials can be synthesized by hot pressing elemental mixture powders without TiC addition at 1 500 ℃ for 60 min, in which TiC and Ti3AlC2 exist as secondary phases. By adding 0.5 mol or 1.0 mol TiC into the raw mixtures, Ti2AlC can be fabricated by hot pressing at 1 400 ℃ for 60 min, and there exist only a small amount of Ti3AlC2 as secondary phase. At the some time, the effect mechanism of TiC on synthesis of Ti2AlC bulk materials were investigated.
Key words: hot pressing; titanium aluminum carbide; titanium carbide
