Fabrication of Short Graphite Fiber Preforms for Liquid Metal Infiltration

Fabrication of Short Graphite Fiber Preforms for Liquid Metal Infiltration
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用于液态金属渗透的短石墨纤维预制件的制造

DOI:
10.1007/s11665-012-0460-4
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发表时间:
2013-06
影响因子:
2.3
通讯作者:
Qu, Xuanhui
Qu, Xuanhui
中科院分区:
材料科学4区
文献类型:
--
作者:
Zhang, Lin;Wang, Ling;Kang, Qiping;Qu, Xuanhui

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采用淀粉基和石蜡基粘结剂制备了用于液态金属浸渗的短石墨纤维预制体。研究了不同粘结剂组分和脱脂工艺参数对短石墨纤维预制体性能的影响。结果表明,采用淀粉基和PW基粘结剂可制备出孔隙率为58-62%、抗压强度为2-3 MPa的石墨纤维预制体。由PW基粘合剂制成的石墨纤维预制体表现出比淀粉基粘合剂更高的压缩强度。利用这些预制体通过真空压力浸渗制备的石墨纤维增强铝基复合材料具有较高的致密度(98.5%)和热导率(186.3W/mK),证明了所制备的预制体用于液态金属浸渗的适用性。
Starch-based and paraffin wax (PW)-based binders were used to fabricate short graphite fiber preforms for liquid metal infiltration. The effects of different binder components and debinding process parameters on the properties of short graphite fiber preforms were investigated. The results indicate that the graphite fiber preforms with appropriate porosity of 58-62% and relatively high compressive strength of about 2-3 MPa can be made by starch-based and PW-based binders. The graphite fiber preforms made from the PW-based binder exhibit higher compressive strength than that of the starch-based binder. Graphite fiber reinforced aluminum composites fabricated by utilizing these preforms through vacuum pressure infiltration have relatively high density of 98.5% and thermal conductivity of 186.3 W/m K, proving the applicability of the prepared preforms for liquid metal infiltration.
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