【摘 要】
：
A novel near-net process, gelcasting, was successfully used to prepare larger size 316L stainless steel parts with complex shape. In this study, the effects of
【机 构】
：
Materials Science and Engineering School
论文部分内容阅读
A novel near-net process, gelcasting, was successfully used to prepare larger size 316L stainless steel parts with complex shape. In this study, the effects of process parameters on the viscosity of the slurry and the dry green strength were investigated. The results show that gas atomization (GA) powder is more suitable for gelcasting compared with water atomization (WA) powder. The maximum solid loading is 55vol% for ball-milled slurry with GA powders. And the optimum amounts of monomers (acrylamide (AM)+methylenebisacrylamide (MBAM); the mass ratio, 30:1) and initiator in the AM system are 1.8% (based on the weight of metal powder) and 0.8%-1.4% (based on the weight of monomers), respectively, at which, the maximum green strength obtained is 33.7 MPa. The mechanical properties of the sintered specimen are as follows: ultimate tensile strength, 493 MPa; yield strength, 162 MPa; and HRB, 72.
其他文献
为了校核三次Hermite配点算法程序的正确性,选用了一类典型的动力学系统——双积分系统的时间最优控制问题作为研究对象,通过将三次Hermite配点法和序列二次规划算法的复合算
通过研究生物质半焦对甲醛和氨的吸附，考察了热解温度和化学处理对半焦吸附能力的影响；同时采用热重分析和酸碱滴定的方法研究了半焦表面酸碱中心的强度和浓度。结果表明：升高热
由于泥质岩富含黏土矿物,尤其是成岩程度较低的中新生代泥质岩常具有显著的膨胀性,而成为膨胀岩的主要类型。在对现有膨胀岩判别指标进行全面分析后,提出以蒙脱石含量、胶结
目的:观察藏北高原环境对健康人血尿酸的影响.方法:随机选择由平原进驻藏北(海拔4 507 m)参军6个月、1年、2年及5年以上的健康军人各30名,测定血尿酸,留尿测24 h尿尿酸.以内
The photoluminescence of Dy~(3+) doped and Dy~(3+), Ce~(3+) codoped in Ba_3La(BO_3)_3 were studied. The dependence of the charge-to-radius ratio (z/r) for RE~(3
The effects of various rare earth elements on growth and isoflavonoid production in hairy root cultures of Pueraria lobata(Willd.) Ohwi(strain TR2) cultured in
Being sessile organisms, plants evolved an unparalleled plasticity in their post-embryonic development, allowing them to adapt and fine-tune their vital paramet
In the past 20-30 years, developmental biologists have made tremendous progress in identifying genes required for the specifica-tion of individual cell types of
An inverse spinel-type metal oxide, magnesium-manganese-titanium oxide (Mg2Mn0.5Ti0.5O4), were prepared using the coprecipitation/thermal crystallization method
The results of experimental study of nanoscale intermetallic formation in surface layer of a metal target at ion implantation are presented. To increase the thi