(东北大学材料与冶金学院，沈阳110006)
摘 要: 测定了稀土矿加两种不同碳质还原剂的团块在常温下、773K焙烧后、1 573～1773 K分别焙烧后的气孔率与压制压力的关系，也测定了这两种团块在焙烧前、773 K及127 3～1673 K分别焙烧后的抗压强度与焙烧温度和时间的关系。
关键字: 碳热法；稀土硅化物合金；气孔率；抗压强度
（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
