共搜索到1214条信息，每页显示10条信息，共122页。用时：0小时0分0秒527毫秒
重要意义[1-4]. PPB的形成一直是冶金材料学者关注的热点和难点.通常认为PPB是由沿合金原始粉末颗粒边界析出的碳化物或碳氧化物构成的网状组织,而这些碳化物或碳氧化物是在热等静压(Hot isostatic pressing, HIP)或挤压工艺前的加热过程中形成的[5-8].有研究指出[9],PPB是来源于由宏观偏析和表面吸附引起的表面脏化:氩气雾化法制备的René95粉末表面有富含Nb... Transactions A, 1986, 17(11): 2075-2077. [3] QIU C, ATTALLAH M, WU X, ANDREWS P. Influence of hot isostatic pressing temperature on microstructure and tensile properties of a nickel-based superalloy powder......
热等静压致密化的计算机模拟及在 TZP陶瓷中的应用 娄彦良1,李少波1,罗慧倩1,李国安1 (1.华中理工大学模具技术国家重点实验室, 武汉 430074) 摘要:根据热等静压的致密化理论,建立热等静压致密化的数学模型,实现了数学模型的计算机模拟,完成了热等静压图计算机计算,绘制与分析. 对3Y-TZP的热等静压图进行了实验验证,实验结果与理论计算结果十分吻合. 利用热等静压图,讨论了热等静压参数优化问题. 关键词:热等静压; 致密化; 数学模型; 计算机模拟; TZP陶瓷; hot isostatic pressing; densification; mathematical model; computer simulation; TZP ceramics; [全文内容正在添加中] ......
(12.62±2.70)MPa提高到(43.05±2.08)MPa. 关键词:磷酸钙骨水泥; 冷等静压处理; 孔隙率; 抗压强度; calcium phosphate cement; cold isostatic pressing; porosity; compressive strength; [全文内容正在添加中] ......
退火温度对纯钒组织和性能的影响 鲜晓斌1,刘柯钊1,叶林森1,谢东华1,陈艳平1 (1.中国工程物理研究院,四川,绵阳,621900) 摘要:研究了不同退火温度对热等静压(HIP)纯钒组织和力学性能的影响.结果表明,纯钒的退火过程呈明显的回复,再结晶,晶粒长大3个阶段;随退火温度升高,板条状马氏体含量减少,温度高于950℃退火时板条状马氏体消失;随着退火温度的升高,纯钒的拉伸强度降低,塑性先增加后降低;塑性在950℃退火时达最大值,延伸率,断面收缩率分别为35.2%,64%. 关键词:钒; 热等静压; 退火; 组织; 力学性能; vanadium; hot isostatic pressing; anneal; microstructure; mechanical property; [全文内容正在添加中] ......
="ChDivSummary" name="ChDivSummary">Densification behavior of high Nb containing TiAl alloys through reactive hot pressing was investigated. The results showed that the density of the sample hot pressed... aspect affecting densification, which will form pore nests. With the increase of hot pressing temperature, the diffusion of Nb becomes more adequate. HIP (Hot isostatic pressing) treatment can only......
the interface of tungsten alloy/Fe6W6C, which show Fe6W6C phase brittle fracture and W/W interfacial failure on the fracture. Key words: tungsten/steel structural composite materials; hot isostatic......
was compacted by two methods.The first method is cold isostatic pressing with further hightemperature annealing,while the second method is spark plasma sintering at various temperatures of process(653 and 683 K).It is found that mean grain size is equal to~290,~730 and ~1160 nm for cold isostatically pressed and spark plasma sintered at 653 and 683 K samples,respectively.The micro-grained sample......
materials,Al2O3-C samples with the length of 850 mm,inner(alumina-graphite) diameter of 50 mm and outer(zirconium) diameter of 85 mm were prepared by cold isostatic compaction pressed at 160 MPa after......
转作用是复合材料断裂韧性提高的主要原因. 关键词:C-SiC-B4C-TiB2复合材料；热压；显微组织；力学性能 中图分类号:TG 33 文献标识码:A Microstructure and mechanical properties of hot pressed C-SiC-B4C-TiB2 composites YU...) Abstract: C-SiC-B4C-TiB2 composites were prepared with raw materials such as flake graphite Cfg, SiC, B4C and TiO2 by in situ synthesis and hot pressed. The effects of Cfg content, sintering......
......
