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射流夹角对加热炉内温度分布的影响的数值模拟研究
  • ISSN号:1000-3940
  • 期刊名称:《锻压技术》
  • 时间:0
  • 分类:TG146[金属学及工艺—金属材料;一般工业技术—材料科学与工程;金属学及工艺—金属学]
  • 作者机构:西北工业大学凝固技术国家重点实验室,西安710072
  • 相关基金:Projects(51201134,51271147)supported by the National Natural Science Foundation of China; Project(2015JM5181)supported by the Natural Science Foundation of Shaanxi Province,China; Project(115-QP-2014)supported by the Research Fund of the State Key Laboratory of Solidification Processing(NWPU),China; Project(3102014JCQ01023)supported by the Fundamental Research Funds for the Central Universities,China
中文摘要:

采用箔-纤维-箔法制备了C/Mo双涂层界面改性Si C纤维增强γ-TiAl基复合材料(SiC/C/Mo/γ-TiAl),并研究其界面改性效果。为了对比研究,在相同工艺下制备了SiC/C/γ-TiAl复合材料。对两种复合材料在800°C和900°C下进行了不同时间的真空热暴露处理,用以研究界面区域的热稳定性。采用扫描电子显微镜和能谱仪分析了复合材料界面的显微组织。结果表明,尽管增加了Mo涂层,但是SiC/C/Mo/γ-TiAl复合材料与SiC/C/γ-TiAl复合材料的界面反应产物相一致,均为介于涂层和基体之间的TiC/Ti2AlC。但是,在900°C及其以下温度,C/Mo双涂层比C单涂层能更好地阻碍界面反应。此外,900°C,200 h热暴露后,在Ti2AlC和基体之间发现了一层新的界面反应产物,该产物富V,与B2相的化学成分接近。

英文摘要:

C/Mo duplex coating interfacially modified SiC fiber-reinforced γ-TiAl matrix composite (SiCf/C/Mo/γ-TiA1) was prepared by foil-fiber-foil method to investigate its interfacial modification effect. SiCf/C/TiAl composites were also prepared under the same processing condition for comparision. Both kinds of the composites were thermally exposed in vacuum at 800 and 900℃ for different durations in order to study thermal stability of the interfacial zone. With the aids of scanning electron microscope (SEM) and energy dispersive spectrometer (EDS), the interracial microstructures of the composites were investigated. The results reveal that, although adding the Mo coating, the interfacial reaction product of the SiCf/C/Mo/TiAl composite is the same with that of the SiCf/C/TiA1 composite, which is TiC/Ti2AlC between the coating and the matrix. However, C/Mo duplex coating is more efficient in hindering interfacial reaction than C single coating at 900 ℃ and below. In addition, a new layer of interfacial reaction product was found between Ti2AlC and the matrix after 900 ℃, 200 h thermal exposure, which is rich in V and close to the chemical composition of B2 phase.

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期刊信息
  • 《锻压技术》
  • 北大核心期刊(2011版)
  • 主管单位:中国机械工业联合会
  • 主办单位:北京机电研究所 中国机械工程学会塑性工程学会
  • 主编:陆辛
  • 地址:北京市海淀区学清路18号北京机电研究所
  • 邮编:100083
  • 邮箱:fst@263.net
  • 电话:010-62920652 82415085
  • 国际标准刊号:ISSN:1000-3940
  • 国内统一刊号:ISSN:11-1942/TG
  • 邮发代号:2-322
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  • 全国中文核心期刊
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  • 被引量:9672