【摘 要】
：
(Mg66.2Zn28.8Ca5)100-xCux (at%, x=0, 1, 3, and 5) bulk metallic glasses (BMGs) of 2 mm in diameter were prepared by the con-ventional copper mold injection cast
【机 构】
：
State Key Laboratory for Advanced Metals and Materials
论文部分内容阅读
(Mg66.2Zn28.8Ca5)100-xCux (at%, x=0, 1, 3, and 5) bulk metallic glasses (BMGs) of 2 mm in diameter were prepared by the con-ventional copper mold injection casting method. Besides, the influence of Cu content on the microstructure, thermal stability, mechanical properties, and corrosion behavior of Mg-Zn-Ca BMGs was investigated. It is found that the addition of Cu decreases the glass-forming ability of Mg-Zn-Ca BMGs. Crystalline phases are precipitated at a higher Cu content, larger than 3at%. The compressive fracture strength of Mg-Zn-Ca BMGs is enhanced by the addition of Cu. With the formation of in-situ composites, the compressive strength of the Mg-Zn-Ca alloy with 3at%Cu reaches 979 MPa, which is the highest strength among the Mg-Zn-Ca alloys. Furthermore, the addition of Cu also results in the increase of corrosion potential and the decrease of corrosion current density in Mg-Zn-Ca BMGs, thereby delaying their biodegradability.
其他文献
The compressive strength of MgO-fluxed pellets was investigated before and after they were reduced.The porosity and pore size of green pellets,product pellets,a
绿色住区是城市建设和发展的最新方向,是以生态(自然和人文)系统的良性循环为基本原则,以可持续发展为目标,建立在自然资源和人文资源最和谐的基础之上,运用生态学基本规律,
目的:探讨攀爬运动中四肢双关节肌的功能现象。方法:任选上海体育学院20名男生,抗自重、不限定姿势进行三种向上攀爬(爬绳、爬竿、引体向上)的运动实验。采用运动解剖学动作
在阿哌沙班的结构基础上,保持其P1部分不变,对其P4部分进行结构改造,用一系列芳香酰胺基团代替2-氮己酮,合成了一系列未见报道的吡唑并吡啶酮类化合物.所合成化合物结构均经I
Tempering is an important process for T/P92 ferritic heat-resistant steel from the viewpoint of microstructure control, as it facili-tates the formation of fina
The hot deformation behaviors of GH4706 alloy were investigated using compression tests in a deformation temperature range from 900°C to 1200°C with a strain
For strip steel with the thickness of 1.6 mm,the yield and tensile strengths as high as 760 and 850 MPa,respectively,were achieved using the compact strip produ
Composite briquettes containing high-phosphorus oolitic hematite and coal were produced with a twin-roller briquette machine using sodium carboxymethyl cellulos
We have systematically studied the microstructure and mechanical properties of Ni-5wt%Al and Ni-20wt%Al composite coat-ings fabricated on 6061-T6 aluminum alloy
Ti-Mo alloys with various Mo contents from 6wt%to 14wt%were processed by spark plasma sintering based on elemental pow-ders. The influence of sintering temperat