Near-net shape manufacture of B4C–Co and ZrC–Co composites by slip casting and pressureless sintering

Big Data Accumulation of L-Shape Extruded Alloys for Interior Parts for High-Speed Trains

“…Direct casting (DC) and air slip (AS) casting are available for casting. In AS casting method, the effective mold height at which cooling water is injected from the mold contact point is lower than that of DC casting method [5][6][7][8]. Therefore, the ingot surface is relatively smooth, and the thickness of abnormal layer such as inverse-segregated layer is also thinned.…”

Microstructure and compressive behavior of lamellar Al2O3p/Al composite prepared by freeze-drying and mechanical-pressure infiltration method

“…Therefore, recently, the lamellar Al matrix composites have been extensively investigated [6]. Several advanced methods, such as mechanical rolling [7], slip casting [8], centrifugal casting [9] and flake powder metallurgy [10], have been adopted to prepare the composites with layered microstructure. Li et al [11,12] found that the Al matrix nanolaminated composites reinforced with carbon nanotubes or graphene demonstrated improved strength and plasticity than that of the uniform distributed composites.…”

NiFe2O4 Ceramic U-Shaped Sleeve Prepared by Slip Casting and Pressureless Sintering

“…。非金属套管耐高温和抗氧化性能较 强, 但抗冲击能力弱、热响应敏感性差, 如碳化硅、 氮化硅、刚玉、氧化镁。金属陶瓷复合材料综合了 陶瓷的耐磨、抗氧化和金属的抗热冲击, 但单一性 能不如金属或非金属, 如 Al 2 O 3 -Cr、MgO-Mo-Cr。 表面涂层技术能赋予零件表面耐磨损、耐高温、耐 腐蚀、抗氧化等多种特殊性能, 但涂层易剥落 [9] 。 NiFe 2 O 4 陶瓷具有高温化学稳定性好、 抗冰晶石 熔盐腐蚀能力强等优点而成为铝电解惰性阳极的首 选材料 [10][11][12][13][14] 。以 NiFe 2 O 4 基惰性阳极为基础, 将 NiFe 2 O 4 陶瓷应用于铝电解热电偶保护套管具备可 行性, 可望实现铝电解连续测温。 注浆成型 [15][16][17][18][19] 是一种工艺简单、成本低的方法, 可以制备出具有高生坯密度、显微结构均匀、形状 复杂的制品。采用注浆成型工艺已经制备了大量的 高性能陶瓷材料, 如 Y 3 Al 5 O 12 [20] 和 MgAl 2 O 4 [21] 透明 陶瓷, Al 2 O 3 [22] 和 Si 3 N 4 [18,23] [26] 。 首先根据前期研究成果 [27] , 考察 根据斯托克斯公式, 颗粒在悬浮液中的沉降速 度 V 可以用如下公式表示 [28] : [29] , 低于 NiFe 2 O 4 纳米颗粒体系的 7.25 [30] , 表明浆料组 成对等电点影响比较大, Zeta 电位绝对值在 pH= 10.9 时达到最大值 54 mV。在强碱性水溶液中, 纳 [31] 提出的等温烧结初期的表达式: 32] 把式(2)转变为:…”