Fe-12Cr-2.5W-x Si-0.4Ti-0.3Y_(2)O_(3)alloys were fabricated by mechanical alloying and vacuum sintering.The effect of sintering temperature and Si content on the microstructure and properties of the alloy was investig...Fe-12Cr-2.5W-x Si-0.4Ti-0.3Y_(2)O_(3)alloys were fabricated by mechanical alloying and vacuum sintering.The effect of sintering temperature and Si content on the microstructure and properties of the alloy was investigated systematically.The experimental results show that the relative density and tensile strength of the alloy were increased with the elevating of sintering temperature and Si content within a certain range.The alloy with 1wt%Si sintered at 1350℃exhibited superior properties,and the relative density and tensile strength were 96.8%and 692.7 MPa,respectively.HAADF and EDAX analysis of nano-precipitation in the matrix indicated that Si could combine with Y,Ti,and O in the sintering process,which was uniformly distributed with the size of 10 nm.Portion of Y_(2)O_(3)had not completely dissolved in the milling process,which was retained in the matrix of the alloy.展开更多
为研究不同起始体重育肥对西门塔尔牛生产性能及经济效益的影响,选取年龄相近且健康的生长期西门塔尔牛18头,按体重分为低体重组、中体重组、高体重组3组,每组6头,在饲养管理条件相同的条件下育肥75 d (其中预试期15 d),育肥结束后测定...为研究不同起始体重育肥对西门塔尔牛生产性能及经济效益的影响,选取年龄相近且健康的生长期西门塔尔牛18头,按体重分为低体重组、中体重组、高体重组3组,每组6头,在饲养管理条件相同的条件下育肥75 d (其中预试期15 d),育肥结束后测定各组西门塔尔牛的生产性能及经济效益。结果表明,中体重组的料重比最低,日增重与经济效益均最高,育肥效果好。展开更多
基金Funded by the Natural Science Foundation of China(No.51801140)the Fundamental Research Funds for the Central Universities(No.WUT3120619103)。
文摘Fe-12Cr-2.5W-x Si-0.4Ti-0.3Y_(2)O_(3)alloys were fabricated by mechanical alloying and vacuum sintering.The effect of sintering temperature and Si content on the microstructure and properties of the alloy was investigated systematically.The experimental results show that the relative density and tensile strength of the alloy were increased with the elevating of sintering temperature and Si content within a certain range.The alloy with 1wt%Si sintered at 1350℃exhibited superior properties,and the relative density and tensile strength were 96.8%and 692.7 MPa,respectively.HAADF and EDAX analysis of nano-precipitation in the matrix indicated that Si could combine with Y,Ti,and O in the sintering process,which was uniformly distributed with the size of 10 nm.Portion of Y_(2)O_(3)had not completely dissolved in the milling process,which was retained in the matrix of the alloy.
文摘为研究不同起始体重育肥对西门塔尔牛生产性能及经济效益的影响,选取年龄相近且健康的生长期西门塔尔牛18头,按体重分为低体重组、中体重组、高体重组3组,每组6头,在饲养管理条件相同的条件下育肥75 d (其中预试期15 d),育肥结束后测定各组西门塔尔牛的生产性能及经济效益。结果表明,中体重组的料重比最低,日增重与经济效益均最高,育肥效果好。
