您的位置: 专家智库 > 资助详情>国家自然科学基金(s11075177)

国家自然科学基金(s11075177)

作品数:3 被引量:1H指数:1
发文基金:国家自然科学基金更多>>
相关领域:一般工业技术金属学及工艺轻工技术与工程电子电信更多>>

文献类型

  • 3篇中文期刊文章

领域

  • 2篇金属学及工艺
  • 2篇一般工业技术
  • 1篇化学工程
  • 1篇电子电信
  • 1篇轻工技术与工...

主题

  • 2篇TUNGST...
  • 1篇ODS
  • 1篇OXIDE
  • 1篇SPARK_...
  • 1篇SPS
  • 1篇CORROS...
  • 1篇CR
  • 1篇H+
  • 1篇INTERN...
  • 1篇IRRADI...
  • 1篇W
  • 1篇VIA
  • 1篇SOL-GE...
  • 1篇FRICTI...
  • 1篇DISLOC...

传媒

  • 2篇Plasma...
  • 1篇Fronti...

年份

  • 1篇2015
  • 1篇2013
  • 1篇2012
3 条 记 录,以下是 1-3
排序方式:
Effect of chromium content on microstructure and corrosion behavior of W-Cr-C coatings prepared on tungsten substrate
2015年
W-Cr-C coatings with different chromium contents (0-3wt.%) were fabricated on the tungsten substrates by spark plasma sintering (SPS) method from the graphite and chromium mixed powders. SEM and XRD were exploited to analyze the effect of Cr contents on the microstructure of coatings. It was found that the abnormal hollow WC grains disappeared with addition of Cr less than 2%, and the microstructures were largely refined and densified. With further increase of Cr addition, the grains changed slightly but the densificaUon was reduced. The most dense coating was achieved at I wt.% Cr. Corrosion behavior of the W-Cr-C coatings were investigated by impedance spectrum and potentiodynamic polarization tests. Results suggested that the W-1Cr-C coated W sample exhibited the lowest corrosion current density and highest corrosion potential due to the most densified microstructure, indicating that the addition of Cr at 1 wt.% was optimal for WC coating against corrosion.
Yan JIANG Jun-Feng YANG Qian-Feng FANG
Synthesis and Characterization of Oxide Dispersion Strengthened Ferritic Steel via a Sol-Gel Route被引量:1
2012年
Nanocrystalline oxide dispersion strengthened (ODS) ferritic steel powders with nominal composition of Fe-14Cr-3W-0.3Ti-0.4Y2O3 are synthesized using sol-gel method and hy- drogen reduction. At low reduction temperature the impurity phase of CrO is detected. At higher reduction temperature the impurity phase is Cr2O3 which eventually disappears with increasing reduction time. A pure ODS ferritic steel phase is obtained after reducing the sol-gel resultant products at 1200℃ for 3 h. The HRTEM and EDS mapping indicate that the Y2O3 particles with a size of about 15 nm are homogenously dispersed in the alloy matrix. The bulk ODS ferritic steel samples prepared from such powders exhibit good mechanical performance with an ultimate tensile stress of 960 MPa.
孙钦星张涛王先平方前锋胡菁刘长松
关键词:SOL-GEL
Effects of Si^3+ and H+ Irradiation Friction on Tungsten Evaluated by Internal Method
2013年
Effects of Si^3+ and H+ irradiation on tungsten were investigated by internal friction (IF) technique. Scanning electron microscope (SEM) analysis revealed that sequential dual Si+H irradiation resulted in more serious damage than single Si irradiation. After irradiation, the IF background was significantly enhanced. Besides, two obvious IF peaks were initially found in tem- perature range of 70~330 K in the sequential Si+H irradiated tungsten sample. The mechanism of increased IF background for the irradiated samples was suggested to originate from the high density dislocations induced by ion irradiation. On the other hand, the relaxation peak PL and non-relaxation peak PH in the Si+H irradiated sample were ascribed to the interaction process of hydrogen atoms with mobile dislocations and transient processes of hydrogen redistribution, respectively. The obtained experimental results verified the high sensitivity of IF method on the irradiation damage behaviors in nuclear materials.
HU JingZHANG YanwenWANG XianpingZHAO ZiqiangFANG QianfengLIU Changsong
关键词:TUNGSTEN
共1页<1>
聚类工具0