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  • 2005-2009  (2)
  • 1990-1994
  • 1970-1974
  • 2006  (2)
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  • 2005-2009  (2)
  • 1990-1994
  • 1970-1974
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  • 1
    Electronic Resource
    Electronic Resource
    Surface Hardening Treatment in Use of CO Gas and Post-Heat Treatment in C.P. Titanium and Titanium Alloys (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 118 (Dec. 2006), p. 109-114 
    Details
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: Surface hardening treatment of titanium materials in use of CO gas was studied includinginvestigation of post heat treatment under vacuum. C.P. titanium, α+β type SP-700 alloy withTi-4.5%Al-3%V-2%Mo-2%Fe and β type alloy with Ti-15%Mo-5%Zr-3%Al were used. Surface hardeningwas conducted by heating these materials at 1073K for 21.6ks in Ar-5%CO gas. Subsequently, specimenssubjected to surface hardening were heated at 1073k for various time periods under vacuum. While themaximum surface hardness value was the largest in C.P. titanium and the least in SP-700 alloy, hardeninglayer thickness was the thickest in β type alloy and the thinnest in C.P. titanium. Surface hardening in C.P.titanium was brought about by solid solution hardening due to oxygen and carbon. Enrichment of theseelements in the surface layer of both titanium alloys caused continuous variations of the microstructure suchas β to α+β, or their volume fractions in the surface hardening layer. Post heat treatment at 1073K increasedthe maximum surface hardness and hardening layer thickness with an extension of the heating time in C.P.titanium, but the surface maximum hardness decreased continuously in β type titanium alloy. Post heattreatment could remove the thin oxide layer formed by surface hardening treatment
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/22/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.118.109.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    Preparation of Ce-ZrO〈sub〉2〈/sub〉 Based Composites and Effect of Addition of 3Y-ZrO〈sub〉2〈/sub〉 on Their Microstructures (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 317-318 (Aug. 2006), p. 41-44 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: 12 mol%CeO2 based composites were fabricated by a pressureless sintering technique and post-HIPtreatments. The mixture of 12CeO2-ZrO2/3Y2O3-ZrO2 (= 80 wt%/20 wt%) powders from various methods wereprepared by a ball milling technique and consequently sintered at 1400[removed info] in air atmosphere and post-HIP treatmentat 1350[removed info]. The 12Ce-ZrO2/Y-ZrO2 composites sintered from mixture of 12CeO2-ZrO2 powder and 3Y2O3-ZrO2powders possessed the high strength over 1300 MPa and also high fracture toughness over 11 MPam1/2. Furthermore,the significant inhibition of the ZrO2 phase transformation of tetragonal to monoclinic phase under an aqueoushydrothermal condition at 150[removed info] was obtained for these 12Ce-ZrO2/Y-ZrO2 composites prepared from this method.Microstructural observation was in detail performed by TEM and EDS
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/51/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.317-318.41.pdf
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    Paper (German National Licenses)
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