Effect of A Whisker Surface Treatment on the Strength of Al<SUB>18</SUB>B<SUB>4</SUB>O<SUB>33</SUB> Whisker Reinforced AC4CH Aluminum Alloy Composites

Abstract

A new surface treatment method for aluminum borate whisker was developed in order to suppress the interfacial reaction between the whisker and aluminum alloy. By depositing Mg on the whiskers under 10 Pa at 650°C for 3.6 ks, and heating them in air at 800°C for 1.8 ks, a uniform MgAl 2 O 4 layer with a thickness of 10-20 nm covered the whisker.

Effects of Aging Treatment on the Bending Strength in AZ91D/Al<SUB>18</SUB>B<SUB>4</SUB>O<SUB>33w</SUB> Composite

“…9,10) So it is necessary to discuss the effects of interfacial reaction layer on fracture behaviors of composite. According to previous investigation, 20) the whiskers are wrapped completely with MgO interfacial reaction layer after solution treatment at 693 K for 172.8 ks.…”

“…The previous researches indicate that the mechanical properties of these composites depend on variety of factors, such as the size, shape and volume fraction of reinforcement; [1][2][3] fabrication method of the composites; 4,5) secondary processing; 6) the internal residual stress 7,8) and the nature of matrix-reinforcement interfaces 9,10) and so on. Moreover, many discontinuously reinforced composites are based on age-hardenable light alloys.…”