摘要
使用表面覆有B4 C涂层的硼纤维 ,采用大气等离子喷涂法制备连续硼纤维增强铝基复合材料预制片 ,结合真空热压扩散焊制备了纤维均匀分布的B/Al复合材料。探讨在接近铝基体熔点温度的条件下热压压力对复合材料力学性能与B/Al界面结合的影响 ,分析了B/Al界面结合状态与断口形貌及力学性能之间的关系。研究表明 :热压压力对制备的B/Al复合材料的纤维体积分数、B纤维与Al基体的界面结合状态和拉伸强度有显著的影响 ;纤维表面的B4 C涂层有效地防止了B纤维与Al基体间的界面反应 ,在温度6 5 0℃、压力 10MPa的条件下 ,制备的纤维体积分数为 4 2 %的B/Al复合材料拉伸强度达到 96 8MPa ,达到了纤维理想强度的 77%。
Aluminum matrix composite reinforced with continuous boron fibers was produced with B 4C coated B fiber by atmospheric plasma spraying processing. The effects of the pressure during hot pressing processing on the mechanical properties of B/Al composite at the temperature near the Al melting point were studied. The effect of the pressure on the bonding at the interface between the fiber and Al matrix was also discussed. The relation between B/Al interface bonding conditions, the fractographs, and mechanical properties were examined. It is shown that the hot pressing pressure influences significantly the volume fraction of fiber, the interaction between fibers and aluminum, and the tensile strength of B/Al. The B 4C coating on the surface of B fiber can prevent the fibers from interaction with the matrix effectively. The B/Al composite containing 42 vol % boron fibers prepared by hot pressing at 650℃ under 10 MPa yields the tensile strength of 968 MPa, which is 77% of the ideal tensile strength of the boron fibers.
出处
《宇航材料工艺》
CAS
CSCD
北大核心
2004年第3期51-55,共5页
Aerospace Materials & Technology
基金
高能束流加工技术国防科技重点实验室基金资助:5 14 610 40 10 1JW0 80 1
关键词
热压压力
B/AL复合材料
组织结构
力学性能
纤维增强金属基复合材料
Plasma spraying,Boron fiber, Hot pressing diffusion, Fiber-reinforced metal matrix composite, Tensile strength, Aluminum matrix
