Obtaining of heteromodulus ZrC-based composite materials, their structure and properties

Y. Mirovoy, A. Burlachenko, S. Buyakova
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引用次数: 1

Abstract

The article is devoted to the impact of carbon additives on densification and mechanical properties of ZrC/C hetero-modulus composites. In case of addition of small amount of carbon to ZrC residual porosity decreases, whereas higher carbon content leads to more than 3vol.% increase in residual porosity. Moreover, increase in carbon content in ZrC/C composites enhance oughness of sintered materials. For example, КIC = 4.3 MPa×m1/2 for ZrC and КIC = 7 MPa×m1/2. for 3 vol.% C. For 15 vol.% of C, toughness is the lowest and equals 5.3 MPa×m1/2. The extrapolation of the dependence of toughness on the non-porous state of materials is КIC0 = 13.2 MPa×m1/2.The article is devoted to the impact of carbon additives on densification and mechanical properties of ZrC/C hetero-modulus composites. In case of addition of small amount of carbon to ZrC residual porosity decreases, whereas higher carbon content leads to more than 3vol.% increase in residual porosity. Moreover, increase in carbon content in ZrC/C composites enhance oughness of sintered materials. For example, КIC = 4.3 MPa×m1/2 for ZrC and КIC = 7 MPa×m1/2. for 3 vol.% C. For 15 vol.% of C, toughness is the lowest and equals 5.3 MPa×m1/2. The extrapolation of the dependence of toughness on the non-porous state of materials is КIC0 = 13.2 MPa×m1/2.
异模zrc基复合材料的制备及其结构和性能
研究了碳添加剂对ZrC/C异模复合材料致密化和力学性能的影响。添加少量碳的ZrC残余孔隙率减小,添加高碳的ZrC残余孔隙率大于3vol。残余孔隙度增加%。此外,增加ZrC/C复合材料中碳的含量可以提高烧结材料的粗糙度。例如:ZrC为КIC = 4.3 MPa×m1/2, КIC = 7 MPa×m1/2。当C含量为3%时,韧性最低,为5.3 MPa×m1/2。外推韧性与材料无孔状态的依赖关系为КIC0 = 13.2 MPa×m1/2。研究了碳添加剂对ZrC/C异模复合材料致密化和力学性能的影响。添加少量碳的ZrC残余孔隙率减小,添加高碳的ZrC残余孔隙率大于3vol。残余孔隙度增加%。此外,增加ZrC/C复合材料中碳的含量可以提高烧结材料的粗糙度。例如:ZrC为КIC = 4.3 MPa×m1/2, КIC = 7 MPa×m1/2。当C含量为3%时,韧性最低,为5.3 MPa×m1/2。外推韧性与材料无孔状态的依赖关系为КIC0 = 13.2 MPa×m1/2。
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