求问A356铝合金中晶粒尺寸要如何描述。?像如图这种金相,用截线法再Image pro plus上得到的平均晶粒尺寸可以算作α-Al的晶粒尺寸吗,审稿人表示这样无法得出晶粒尺寸,得到的是一个显微长度值。: average "grain size" measurement. The authors need to clarify if they are actually measuring the grain size or a characteristic microstructural length (e.g. dendritic spacings). The microstructures observed are dendritic, and several dendrite may belong to a single grain. Depending on the appropriateness of the method, the authors may want to change the mentions to "average grain size" to "characteristic microstructural length" throughout the paper, if what they measure is actually not a grain size but a combination of grain size and dendritic spacings. 谢谢大家!! A356查看更多2个回答 . 16人已关注
Li-S电池新型固硫剂---空心薄壁3D石榴状多孔碳微球?今天看了国家纳米科学中心王汉夫、孙连峰以及褚卫国三位老师联合在Nano Energy上发表有关Li-S电池新型 固硫剂 ---3D石榴状多孔碳微球的文章,硫面载量为2.0和4.3 mg cm-2的S/ PCMSs电极在0.2 C(4 C)下分别释放出1239mA h g-1(742 mA h g-1)和941 mA h g-1(480 mA h g-1)的容量,在4 C下500周和2 C下900周循环时,容量衰减率分别为0.014%/周和0.060%/周。作者把其优异的循环性能归因于载体对聚 硫化物 的有效物理限制(薄碳壁分离)和硫与氧之间强烈的相互作用。好像纳米多孔碳也有同样的特点(三维贯通的纳米笼、孔壁表面修饰大量羟基),用在锂硫电池正极材料上应该有前景吧? NCP3.jpg TEM.jpg 示意图.jpg查看更多1个回答 . 8人已关注