1. Objective of ExperimentThe cross section of the specimen made of metal bond is examined to observe the fine structure, and the shape, distribution ..
The effects of annealing on the microstructure and mechanical properties of Al–Zn–Mg–Cu–Si alloys fabricated ... Meanwhile, the HEBM-sintered alloy contains Mg-free Si and θ-Al2Cu phases due to the formation of MgO ... dissolution and coarsening of the Q-AlCuMgSi and Mg2Si phases in the alloy and dissolution of the θ-Al2Cu
Porous Cu with a dispersion of nanoscale Al2O3 particles is fabricated by freeze-drying CuO-Al2O3/camphene ... Microstructural analysis reveals that 100-nm Al2O3 particles are homogeneously dispersed in the Cu matrix ... Camphene slurries with CuO-Al2O3 contents of 5 and 10 vol% are unidirectionally frozen at -30oC, and
Both Cu and Al have an almost similar effect on the coercivity improvement, particularly over the heat ... Moreover, at 880oC, the coercivity increases by 3.8 kOe in Cu and 4.7 kOe in Al-mixed DyH2-coated magnets ... We investigate the microstructural and magnetic property changes of DyH2, Cu + DyH2, and Al + DyH2 diffusion-treated
In this study, an Al-0.7wt%Fe-0.2wt%Mg-0.2wt%Cu-0.02wt%B alloy was designed to fabricate an aluminum ... The designed Alalloy was processed by casting, extrusion and drawing processes. ... The drawn Alalloy wire was then annealed at various temperatures of 200 to 400 °C for 30 minutes.
Al-Cu계 합금은 Al합금의 중요한 위치에 있고 그 사용량도 가장 많다. Al-Cu의 상태도 나. ... Al-Cu계 합금 공정온도에서 Al은 5.7% Cu를 고용한다. 온도가 강하함에 따라 용해도는 감소하여 400℃에서 1.5%, 200℃에서 0.5% Cu를 고용한다. ... Al-Cu의 석출경화에 따른 경도측정 1. 실험 목적 가.
investigated the growth behavior and characteristics of compounds formed at the interface between a liquid Al-Si-Cu ... of the microstructural analysis indicate that the primary phases of the interfacial compounds in the Al-Si-Cu ... base alloy are Al8Fe2Si and Al4.5FeSi.
% of Hg, 92.0 % of Sn and 91.4 % of Cu respectively. ... A single cycle treatment of redox reaction of Cu-Zn metalalloy, could remove 100.0 % of Cr(Ⅲ), 98.0 ... removal study is conducted from synthetic waste water by reduction and oxidation(redox) reaction of Cu-Zn
In this study, the effects of adding small amounts of Cu and Zr to the Al-Si-Mg based alloy on tensile ... and Al8Fe2Si phases, as in the case of the Al-Si-Mg alloys. ... The influence of Cu and Zr addition on the type and thickness of the interfacial compounds layer formed
GP(1) : 석출물이라고 부르기엔 작은 Cu 원자들이 Al 속에서 Al 결정 구조로 되어 있다 보니 Cu 주위에 있는 Al 원자들이 왜곡되어 있다. ... Al은 Fe, Cu등과 접촉하면 Al이 현저하게 부식하는 접촉부식이 생긴다. 그러나 Al보다 낮은 전위의 Mg, Zn을 접촉시켜서 NaCl 용액속에 넣으면 Al은 부식되지 않는다. ... Al 속에서 Cu의 고용도가 b→a 로 감소하므로 석출하는 CuAl₂(θ)의 양도 증가하여 c→e 로 된다. 0℃에서는 Cu의 고용도가 c→d 로 감소하였으므로 CuAl₂의 양도
Al-Cu powder mixtures were prepared by low energy ball milling with various milling time. ... In this study, gradient porous Al-Cu sintered body was fabricated by powder metallurgy processing. ... Subsequently, Al-Cu powder mixtures were classified (under 150, 150~300 and over 300 ) and compacted
behaviour of an Al-Y-Ni alloy. 1 at.% Cu was added to a base alloy of Al/sub 88/Y₄Ni/sub 8/ either by ... Consistent with previous findings in the literature, the substitution of Cu for Al was found to increase ... substitution for Al to form Al/sub 87/Y₄Ni/sub 8/Cu₁, or by substitution for Ni to form Al/sub 88/Y₄Ni
The effect of Cu content on microstructure and mechanical properties of nano-sized Cu dispersed nanocomposites ... The nanocomposites with Cu content of 2.5 to were prepared by reduction and hot-pressing of powder ... The nanocomposites with Cu content of 2.5 and exhibited the maximum fracture strength of 820MPa and