2篇
您的检索式：作者名="Shengguo MA"
|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Study on growth of coarse grains of diamond with high quality under HPHT显示文摘The growth of coarse grains of diamond was observed with graphite as carbon source and Fe80Ni20 alloy powder as catalyst at HPHT in a China-type SPD 6×1670T cubic high-pressure apparatus with highly exact control system. To synthesize coarse grains of diamond crystal with high quality,ad-vanced indirect heat assembly,powder catalyst technology and catalyst with optimal granularity were used. Especially the nucleation of diamond and the growth rate were strictly controlled by the opti-mized synthesis craft. At last,diamond crystals (about 0.85 mm) in the perfect hex-octahedron shape were successfully synthesized at ~5.4 GPa and ~1360℃ in 60 min. The characteristic of crystal growth with powder catalyst technology under HPHT was discussed. The results and techniques might be useful for production of coarse grains of diamond. | ZHOU ShengGuo ZANG ChuanYi MA HongAn LI XiaoLei ZHANG HeMin JIA XiaoPeng | 2009 | Chinese Science Bulletin2009，54，1： | 6 |
| 2 | Optimizing Mechanical Properties of AlCoCrFeNiTi_x High-Entropy Alloys by Tailoring Microstructures显示文摘The effects of Ti addtions and the heat treatment on the mechanical properties of AlCoCrFeNiTix (x = 0, 0.2, 0.3, 0.4 and 0.5) high-entropy alloys (HEAs) were studied. The results show that the dendrite phase with a body-centered-cubic (bcc) structure transforms into the interdendrite phase with a new bcc structure. With the increase of the Ti contents and heat-treatment temperature, the average hardness and yield strengths are greatly improved, and the highest hardness and yielding strength are 583 HV and 2.07 GPa, respectively in the investigated HEA system. The as-cast and annealed HEAs exhibit excellent mechanical properties, combining with high yielding strength and plasticity. The solid solution strengthening mechanism of Ti additions is responsible for the strengthening effect of AlCoCrFeNiTix HEAs. | Yinfeng WANG Shengguo MA Xiaohua CHEN Juyan SHI Yong ZHANG Junwei QIAO | 2013 | Acta Metallurgica Sinica(English Letters)2013，26，3： | 6 |
您所在的机构暂未开通此部分的功能，请联系管理员