(東北大學(xué)材料與冶金學(xué)院，沈陽110006)
摘 要: 測(cè)定了稀土礦加兩種不同碳質(zhì)還原劑的團(tuán)塊在常溫下、773K焙燒后、1 573～1773 K分別焙燒后的氣孔率與壓制壓力的關(guān)系，也測(cè)定了這兩種團(tuán)塊在焙燒前、773 K及127 3～1673 K分別焙燒后的抗壓強(qiáng)度與焙燒溫度和時(shí)間的關(guān)系。
關(guān)鍵字: 碳熱法；稀土硅化物合金；氣孔率；抗壓強(qiáng)度
（School of Materials and Metallurgy, Northeastern University, Shenyang 110006, P.R.China）
Abstract:This study was focussed upon the porosity (pore ratio) and compressive strength of the raw material, which was mixed the rare earth concentrates with two kinds of carbon reductants, A0 and B0, and pressed into compacts. After the compacts were roasted at 773K, 1573～1773K respectively, their porosity and compressive strength were measured, and were compared with those of the compacts un-roasted. The results show that, the porosity of all compacts decreases with increasing pressing pressure linearly, and the porosities of the compacts roasted at 157 3 ～1773 K reach to 50%～55%; the compressive strength of the compacts roasted at 773K increases remarkably, but those of the compacts roasted at 1273～1673K decrease with the increase of roasting temperature and time.
Key words: carbon thermal reduction; rare earth silicide alloys; porosity; compressive strength
