HIGH TEMPERATURE TENSILE PROPERTIES AND FATIGUE BEHAVIOR OF A MELT-INFILTRATED SIC/SIC COMPOSITE
HIGH TEMPERATURE TENSILE PROPERTIES AND FATIGUE BEHAVIOR OF A MELT-INFILTRATED SIC/SIC COMPOSITE
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熔渗 SIC/SIC 复合材料的高温拉伸性能和疲劳行为
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
L. J. Kiraly
中科院分区：
文献类型：
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作者：
S. Kalluri;A. Calomino;D. Brewer;L. J. Kiraly
在两种温度下的空气中研究了编织 SiC/SiC 陶瓷基复合材料 (CMC) 的高温疲劳行为。 CMC 的增强材料由具有 [0°/90°]4 s 铺层的 5HS Sylramic TM 织物组成。通过浆料浇铸、熔渗工艺将 SiC 基体材料渗透到纤维预制件中。拉伸和疲劳测试样本由 CMC 板加工而成。最初进行拉伸测试以获得1038℃和1204℃下拉伸性能的平均值。随后，在相同的两个温度下进行了在最大应力下保持零小时和两小时的低周疲劳（LCF）测试。 LCF 测试中生成的疲劳寿命数据用于确定几何平均疲劳寿命。本文记录了在不同负载条件下测定的 CMC 的拉伸行为和疲劳耐久性。此外，还讨论了由于在最大拉伸应力下保持两小时而观察到的复合材料循环寿命的减少。
High temperature fatigue behavior of a woven, SiC/SiC ceramic matrix composite (CMC) was investigated in air at two temperatures. The reinforcement for the CMC consisted of 5HS Sylramic TM fabric with a [0°/90°]4 s lay-up. The SiC matrix material was infiltrated into the fiber preform with a slurry-cast, melt-infiltration process. Tensile and fatigue test specimens were machined from the CMC plates. Initially tensile tests were conducted to obtain the average values of tensile properties at 1038 and 1204°C. Subsequently, low-cycle fatigue (LCF) tests with zero and two-hour hold-times at the maximum stress were conducted at the same two temperatures. Fatigue life data generated in the LCF tests were used to determine the geometric mean fatigue lives. In this paper, the tensile behavior and the fatigue durability of the CMC determined under different loading conditions are documented. In addition, reductions observed in the cyclic lives of the composite due to the two hour hold-time at maximum tensile stress are discussed.