10Fiset M,et al.The influence of niobium on fracture toughness and abrasion resistance in high-chromium white cast irons[J].Journal of Materials Science Letters,1993,(12):615-617.
8KNOX ANNA S, KNOX JOHN D, ADRIANO DOMY C, et al. Coal Combustion Byproducts and Environmental Issues[M], New York: Springer, 2006:184-189.
9STOUT WILLIAM L, SHARPLEY ANDREW N, WEAVER STEFAN R. Effect of Amending High Phosphorus Soils with Flue- Gas Desulfurization Gypsum on Plant Uptake and Soil Fractions of Phosphorus[J]. Nutrient Cycling in Agroecosystems, 2003, 67(1): 21-29.
