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High-Strain Rate Superplastic Zirconia Systems

机译:高应变率超塑性氧化锆系统

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摘要

The purpose of this study is to fabricate high-strain rate above 10~(-2) s~(-1) superplastic zirconia systems. Dense, homogeneous and fine-grained zirconia systems of MgO and TiO_2 added 3YTZ (3mol%Y_2O_3 doped tetragonal zirconia), and Al_2O_3 and/or Mn_3O_4 added 3YTZ were obtained by colloidal processing The grain growth was controlled by cation lattice diffusion and the grain growth rate was enhanced by adding TiO_2 , Al_2O_3 and/or Mn_3O_4 High-strain rate superplasticity was established for the systems of 3(Y_2O_3, MgO) · 97(Zr_(0.95)Ti_(0.05))O_2 and small amounts of Al_2O_3 and/or Mn_3O_4 added 3YTZ. Such excellent superplasticity is due to the homogeneous, fine grained microstructure and enhancement of cation lattice diffusion in 3YTZ by addition of TiO_2, Al_2O_3 and/or Mn_3O_4.
机译:这项研究的目的是在10〜(-2)s〜(-1)超塑性氧化锆系统之上制造高应变率。 MgO和TiO_2加入3YTZ(3mol%Y_2O_3掺杂的四方氧化锆)的致密,均质和细粒度的氧化锆体系,并通过胶体加工获得Al_2O_3和/或Mn_3O_4添加的3YTZ晶粒的生长受阳离子晶格扩散和晶粒生长的控制通过添加TiO_2,Al_2O_3和/或Mn_3O_4来提高速率。建立了3(Y_2O_3,MgO)·97(Zr_(0.95)Ti_(0.05))O_2和少量Al_2O_3和/或系统的高应变速率超塑性。 Mn_3O_4添加了3YTZ。如此优异的超塑性是由于3YTZ中均匀,细晶粒的微观结构以及通过添加TiO_2,Al_2O_3和/或Mn_3O_4增强的阳离子晶格扩散。

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