金刚石与磨料磨具工程Issue(1)：31-34,43,5.DOI:10.13394/j.cnki.jgszz.2015.1.0007
Si粉过渡塑性相对锆刚玉材料结构和性能的影响
Effects of transient plastic phase of Si powder on microstructure and properties of corundum-zirconia materials
摘要
Abstract
SiC-SiAlON bonded corundum-zirconia materials were prepared via the transient plastic phase,buried in carbon at 1500 ℃ for 3 h.Corundum-zirconia powder,added with Si powder of different mass fractions(4%,6%,8% and 10%),was used as starting material.The results showed that Si powder not only played a role in plastic phase molding,but also promoted the sintering process and improved the modulus of rupture and thermal shock resistance of corundum-zirconia material. When 1 0% Si powder was added,the values of cold modulus of rupture and residual strength ratio were 33 MPa and 85%,respectively.Compared with the sample without Si powder addition,they were increased by 24 MPa and 16%.And the maximum hot modulus of rupture was obtained at 8% Si powder,which was 8 MPa,about 2.3 times compared with that of the sample without Si powder addition.The improvement of modulus of rupture and thermal shock resistance of corundum-zirconia materials was attributed to SiC and SiAlON,which were interspersed in corundum-zirconia skeleton structure leading the strengthening. In addition, when cracks met SiC fibres, which resulted in strengthening and toughening effects by the bridging traction and the deflection,then improved the modulus of rupture and thermal shock resistance of corundum-zirconia materials.关键词
Si粉/锆刚玉/过渡塑性相工艺/抗折强度/抗热震性Key words
Si powder/corundum-zirconia/transient plastic phase processing/modulus of rupture/thermal shock resistance分类
通用工业技术引用本文复制引用
李文凤,李素平,钟香崇..Si粉过渡塑性相对锆刚玉材料结构和性能的影响[J].金刚石与磨料磨具工程,2015,(1):31-34,43,5.基金项目
河南省教育厅科学技术研究重点项目(No.12B430019) （No.12B430019）
河南省科技厅资助项目(No.122300410244)。 （No.122300410244）
