The present study focuses on the influence of substrate roughness on the tribological properties of Ti-6Al-4V, dry sliding against stainless steel ball under vacuum environment.
Well-ordered opal-diamond composite and inverted opal (IO) structure in single crystal (SC) diamond have been prepared by microwave plasma CVD.The process is based on epitaxial diamond growth through
(K,Na)NbO3 (KNN) based ceramics, as competitive lead-free counterparts, have attracted substantial attentions because of their high piezoelectric response.In this work, KNN based epitaxial thin films
Earth radiation budget is of significance to the study of weather and climate and their correlation.The new generation of earth radiation detectors based on short wave channel (0.3~5.0 μm) and the tot
Tailored production of nonstoichiometric titanium dioxide nanostructured thin film (TNF) has attracted considerable interest in the green energy field.In this paper,amorphous TNFs were deposited by th
In recent years, WOx electrochromic thin films by glancing angle deposition (GLAD) have been demonstrated to be preponderant due to the favorable diffusion of ions.The WO3-based thin films are deposit
本文通过对钢纤维体积含量为0％和2％的两种活性粉末混凝土试件分别加载至峰值荷载的0、60％、70％和80％的压力值来模拟不同程度的损伤，得到了试件在不同程度损伤后加载度与基频振动频率之间的关系曲线，然后采用干湿循环法对试件的抗硫酸盐侵蚀能力进行了研究.研究表明：50次硫酸钠溶液干湿循环作用下，两种试件的基振频率均随损伤程的提高一直呈增长趋势，未掺钢纤维试件的增幅较大，最大增幅达6.3％.钢纤维掺量
本文通过对钢纤维掺量为O％和2％的两种活性粉末混凝土试件分别加载至峰值荷载的O％、60％、70％和80％的压力值来模拟不同程度的损伤，得到了试件在不同程度损伤后加载度与基频振动频率之间的关系曲线，然后采用单面冻融法对试件的抗冻性能进行了研究.研究表明：56次冻融循环作用下，两种试件的基振频率均随损伤程度的提高而降低，钢纤维掺量为2％的试件降低程度较小，最大降幅仅为6.3％.冻融循环作用后，两种试件
近年来,对石膏晶体在溶解过程中表面形貌的研究大多侧重于溶蚀孔洞的形成和生长,而对于石膏晶体表面的绝对溶解速率却鲜有报道.本论文采用了反射型全息显微镜为测试手段,测试了在流水情况下,石膏晶体(O1O)解理面上,溶蚀孔洞,解理面阶梯,以及无缺陷晶面的绝对溶解速率.对七个不同的解理面进行了局部随机采样观察,通过测量局部晶面形貌特征的变化,确定了局部晶面的溶解速率,并且发现了四种特征行为：1)无溶蚀孔洞以
The distance between particles (DP) plays a key role in the flowability of fresh cement pastes.DP given by available literatures is an average value and independent with the particle size.Actually, co