Effects of temperature and stress on the creep behavior of a Ni3Al base single crystal alloy

The creep behavior and microstructure of a Ni3Al base single crystal alloy IC6SX with [001] orientation under the testing conditions of 760 ℃/593 MPa, 980 ℃/205 MPa, and 1100 ℃/75 MPa were investigated. The experimental results showed that Alloy IC6SX had good creep resistance and its creep resistance at elevated temperatures was similar to the second generation nickel-base single crystal alloy containing Re. TEM analysis indicated that the dislocation configuration and movement pattern were different under different temperature and stress conditions. It has been found that under the test condition of 1070 ℃/137 MPa the dislocations moved within the γ channel during the primary creep stage, and the motion of dislocations were prevented by the matrix of γ′ phase, which reduced the creep rate of the alloy. In the secondary creep stage, dislocations cut into the γ′ phase from the γ/γ′ interface. However in the third creep stage, the dislocation pileups were observed in both γ and γ′ phase, and dislocation multiplication occurred when the dislocations with different Burgers vector met and reacted each other.     

可压缩流体系统的解的整体存在性

在外力存在,压力和粘性系数依赖密度的假设下,研究了一维可压缩流体模型的自由边界值问题,利用数学方法和能量估计得到了弱解的整体存在性．     

7—羟基—8—甲氧基—4（1H）喹啉酮及其衍生物的合成

报导了7-羟基-8-甲氧基-4(1H)喹啉酮(Q-A)和它的10种衍生物的合成路线,理化性质及波谱数据;证明了Q-A合成品和由中国软珊瑚Sinularia Polydactyla分离到的天然产物Q-A是一致的。     

盐胁迫下小麦新品系89122的抗氧化酶活性和内源ABA含量变化的研究

利用花粉管通道法获得的转基因耐盐小麦新品系89122和其受体“陇春13”,在盐胁迫处理下,测定盐胁迫后89122和“陇春13”无性细胞系的抗氧化酶活性的变化和脱落酸的变化,结果表明,89122较其受体“陇春13”能维持较高的SOD,POD,CAT活性,ABA含量明显高于受体。     

利用共焦成像原理实现微米级的三维轮廓测量

以普通光学成像透镜取代显微物镜,以针孔阵列(500×500)取代单针孔,实现了全场并行共焦测量.在数据处理上,采用了内插值三维重构算法,以及二次曲面拟合的系统误差校正算法,可以在较大的采样间距下获取较高的测量精度.实验表明,系统的最大横向测量范围为5mm×5mm,横向测量精度约为13μm,纵向测量精度约为5μm,因此可大大提高测量视场及测量速度.     

液控刚性试验装置的研制

本文系统地介绍了液控刚性试验装置的工作原理结构及测试系统.并给出了由该装置测出的各类典型脆性材料的应力应变全过程曲线。     

内插法可编程函数发生器

用内插法由数模转换和波形编码存贮器等器件组成了可编程函数发生器。比之用一般方法组成的发生器,波形质量和频率都有了显著提高。     

固态发酵淀粉质原料生产单细胞蛋白

采用YUZ-500型圆盘式固态发酵器,选 SC_(85)、ST_(851)和SU_(64)菌株,以固态发酵技术,将淀粉质原料转化成单细胞蛋白(SCP).其产品含粗蛋白40％以上,蛋白质净增25％,其中氨基酸含量占总蛋白质的82.5％蛋氨酸含量占氨基酸总量4.33％,尚含有多种酶、维生素及微量元素.将产品对肉食鸡、肉兔、罗菲鱼的增重和产蛋鸡的产蛋率进行饲喂试验,结果与鱼粉组对比,无显著性差异,表明该产品可替代鱼粉,动物安全性评价试验结果证明该产品实属无毒,安全可靠。