烧结过程中施加压力对电泳浸渗制备SiCf/SiC复合材料致密化及力学性能的影响

IF 0.8 Q3 MULTIDISCIPLINARY SCIENCES
A. Noviyanto
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引用次数: 2

摘要

在不同压力下,通过电泳渗透和烧结制备了SiC纤维增强SiC基陶瓷(SiCf/SiC)复合材料。对施加压力(即5、10和20 MPa)的影响进行了彻底的研究,施加压力似乎会影响SiCf/SiC复合材料的致密化和机械性能。在5、10和20 MPa压力下制备的SiCf/SiC复合材料密度分别为2.99、3.10和3.16 g/cm。所有样品的基体区域均呈现致密的显微结构;然而,随着压力的增加,发现了许多封闭的孔隙。压力引起纤维区致密化,20 MPa被确定为足够致密化所需的最小压力。在较高的施加压力下,有效地保持了基体区域的液相,从而导致致密化。然而,当施加压力<20 MPa时,液相重新分布到基体或靠近基体区域,导致这些样品的纤维区域出现孔隙。在施加压力为20 MPa时,SiCf/SiC复合材料的最高抗弯强度为262±18 MPa。同时,在5和10 MPa下制备的复合材料的抗弯强度分别为198±41和238±32 MPa;
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of Applied Pressure During Sintering on the Densification and Mechanical Properties of SiCf/SiC Composites Prepared by Electrophoretic Infiltration
SiC-fiber-reinforced SiC matrix ceramic (SiCf/SiC) composites were successfully fabricated by electrophoretic infiltration and sintering at various applied pressures. The effect of applied pressure (i.e., 5, 10, and 20 MPa) was thoroughly examined, and applied pressure appears to influence the densification and mechanical properties of SiCf/SiC composites. The densities of SiCf/SiC composites prepared at applied pressure of 5, 10, and 20 MPa were 2.99, 3.10, and 3.16 g/cm, respectively. All samples showed dense microstructures in their matrix areas; however, many closed pores were found with increasing pressure. Pressure induced densification in the fiber area, and 20 MPa was determined to be the minimum pressure required for adequate densification. The liquid phase in the matrix area was effectively maintained at a high applied pressure, which resulted in densification. However, the liquid phase redistributed to the matrix or near the matrix area at applied pressures of <20 MPa, leading to pores in the fiber areas of these samples. The highest flexural strength of 262 ± 18 MPa for the SiCf/SiC composite was achieved at an applied pressure of 20 MPa. Meanwhile, the flexural strengths of the composites prepared at 5 and 10 MPa were 198 ± 41 and 238 ± 32 MPa,
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来源期刊
Makara Journal of Science
Makara Journal of Science MULTIDISCIPLINARY SCIENCES-
CiteScore
1.30
自引率
20.00%
发文量
24
审稿时长
24 weeks
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