Ti-Al-Cr系L1_0型およびL1_2型合金の接合による拡散層の傾斜化 [in Japanese] Formation of Graded Diffusion Layer by Bonding of L1_0-and L1_2-Alloys in the Ti-Al-Cr System [in Japanese]
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Diffusion bonding of L1<SUB>0</SUB>-type and L1<SUB>2</SUB>-type alloys in the Ti-Al-Cr system was carried out to study graded diffusion layer. The Ti<SUB>52</SUB>Cr<SUB>5</SUB>Al<SUB>43</SUB>(L1<SUB>0</SUB>) and Ti<SUB>25</SUB>Cr<SUB>14</SUB>Al<SUB>61</SUB>(L1<SUB>2</SUB>) alloys were bonded at 1473 K for 1 h under 30 MPa, and annealed at 1423 K for 48 h in a vacuum(-10<SUP>-4</SUP>Pa). The resulting diffusion layer had Al-rich L1<SUB>0</SUB> phase layer of about 50μm and L1<SUB>2</SUB>/L1<SUB>0</SUB> (coherent precipitated) two phase layer of about 50μm. The formation of the L1<SUB>2</SUB>/L1<SUB>0</SUB> two phase layer is caused by the presence of the Ti-rich L1<SUB>2</SUB> phase field at higher temperatures. It was found that such diffusion layers have a preferable composition gradient and a graded linear expansion coefficient for functionally graded materials.
- J. Jpn. Soc. Powder Powder Metallurgy
J. Jpn. Soc. Powder Powder Metallurgy 45(3), 225-230, 1998-03-15
Japan Society of Powder and Powder Metallurgy