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TZM合金真空燒結(jié)脫氧的機制分析
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Deoxidation Mechanism of TZM Molybdenum Alloys during Vacuum Sintering
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    摘要:

    研究添加活性金屬元素和碳的TZM鉬合金在真空燒結(jié)后氧元素的變化，通過熱力學計算和分析研究鉬合金的脫氧機制。結(jié)果表明：在粉末冶金TZM燒結(jié)過程中，主要有兩種脫氧機制：（1）碳還原體系中的金屬氧化物生成金屬碳化物和CO；（2）MoO2在真空高溫下發(fā)生歧化反應生成金屬Mo和MoO3氣體，MoO3氣體被真空系統(tǒng)抽出。提高爐內(nèi)真空度和降低產(chǎn)物氣體的分壓可降低脫氧反應進行的溫度，有利于脫氧。

    Abstract:

    The change of oxygen was studied for the TZM molybdenum alloys with addition of active metal element and carbon after vacuum sintering. The mechanism of deoxidation of molybdenum alloys was analyzed through the thermodynamic calculation. The results show that in the sintering process of powder metallurgical TZM, there are two kinds of deoxidation mechanisms. One is that metal oxide compound in TZM react with the carbon to produce CO and metal carbide; the other is that the disproportionting reaction of MoO2 occurs at high temperature to produce metal Mo and MoO3 gas and the gas is drawn out by the vacuum system. Improving the vacuum degree of the furnace and reducing the partial pressure of product gas can decrease reaction temperature and is good for deoxidation.

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梁 靜,李來平,奚正平,湯慧萍. TZM合金真空燒結(jié)脫氧的機制分析[J].稀有金屬材料與工程,2011,40(6):987~990.[Liang Jing, Li Laiping, Xi Zhengping, Tang Huiping. Deoxidation Mechanism of TZM Molybdenum Alloys during Vacuum Sintering[J]. Rare Metal Materials and Engineering,2011,40(6):987~990.]
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  • 收稿日期:2010-06-17
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