【摘 要】
：
Fused corundum is a rather promising raw material for preparing an alumina-based ceramic core due to its excellent high temperature resistance and chemical inertness. In this study, alumina-based ceramic cores were prepared using fused corundum as the mat
【机 构】
：
Shenyang Research Institute of Foundry Co.,Ltd.,Shenyang 110022,China
论文部分内容阅读
Fused corundum is a rather promising raw material for preparing an alumina-based ceramic core due to its excellent high temperature resistance and chemical inertness. In this study, alumina-based ceramic cores were prepared using fused corundum as the matrix material, and the effect of varying silica powder contents on the properties of the alumina-based ceramic cores, including the sintering shrinkage, the flexural strength, and the high temperature deformation was investigated. The mineralization mechanisms of the silica on the alumina-based ceramic core were also analyzed. The optimum addition amount of silica in this experiment is 8％ in weight. At that moment, the aluminum-based core has both a low sintering shrinkage coefficient of 0.66％ and better properties: the room temperature flexural strength is 22.19 MPa, the high temperature flexural strength is 21.54 MPa, the high temperature deformation is 0.93 mm, and the residual flexural strength is 47.41 MPa.
其他文献
SCADA系统是当前长输管线必不可少的自控配置,SCADA系统调控中心起到了大脑和中枢神经的功能,本文概简要介绍SCADA系统调控中心的功能、组成,相关的设计要点,并以某省天然气输气管道SCADA系统调控中心为例,简要说明调控中心建筑、暖通、火灾检测及设备布置等要求.
3D reconstruction was adopted to characterize the microstructural morphologies of Mg-3.0Nd-0.3Zn-0.6Zr alloy castings produced by high pressure die casting (HPDC) processes with different parameters, including low slow-shot speed, solidification pressuriz
SiC inclusions in a multicrystalline silicon ingot have a negative effect on the performance of solar cells. The migration behavior and aggregation mechanism of SiC particles in the silicon melt during the directional solidification process was studied. R
为打破我国铁路货运各业务系统板块间的信息壁垒,解决手工作业和纸质票据传递的痛点,迫切需要对铁路货运实施票据电子化.通过梳理票据类型、作业流程,从采集数据、存储数据、构建一体化作业系统与建立一体化规章等方面设计货运票据电子化总体架构,提出票车绑定与解绑、双中心架构、铁路局集团公司缓存等关键技术,实施铁路货运票据电子化.通过业务整合与系统优化,实现铁路内部生产信息的电子化流转与货运数据的全程共享.货运票据电子化的实施可为铁路货运改革提供坚实保障.
AZ91D and 8.5vol.％ SiCp/AZ91D magnesium matrix composites were fabricated by a semi-solid extruded processing method, and treated with solution and aging heat treatment. The effects of SiCp on the microstructures of the semi-solid extruded AZ91D magnesium
A two-dimensional phase field (PF) model was developed to simulate the dendritic solidification in magnesium alloy with hcp crystal structure. By applying a parallel-adaptive mesh refinement (Para-AMR) algorithm, the computational efficiency of the numeri
The electroslag remelting (ESR) process is widely used to produce high-quality ingots and billets for high-alloyed steels and alloys. Both the single-phase and three-phase alternating current diagram with bifilar and monofilar connection are in use for he
In recent years, metal matrix syntactic foams (MMSFs) have become highly attractive owing to their unique physical, microstructural and mechanical features. Due to their promising potential for different industrial areas like automotive, aviation, and def
A novel α+β titanium alloy with multi-alloying addition was designed based on the cluster formula 12[Al-Ti12](AlTi2)+5[Al-Ti14](AlV1.2Mo0.6Nb0.2) which was derived from Ti-6Al-4V. The nominal composition of this novel alloy was determined as Ti-6.83Al-2.2
Based on STL (stereo lithography) format file and with Microsoft Visual C++ 6.0 programming language, a 3D printing slicing software appropriate for the surface strengthening of the parts has been developed, which includes three functions: 3D model import