Fig.4 XRD pattern of coatings 因此,通过激光重熔可以极大提高Al2O3- 40%TiO2等离子喷涂层的耐冲蚀性能. 图5为等离子喷涂层的磨损形貌. 由图5a可以发现,冲蚀后的涂层表面有大量喷涂颗粒和片层剥落现象,并且在孔隙等缺陷处这种剥落现象更为显著. 此外,孔隙周围的涂层,存在一定程度的显微裂纹,如图5b所示,这些裂纹...
XRD pattern exhibited gamma-Al2O3 to alpha-Al2O3 structural phase transition in the samples. The mean diameter of sphere-like as-prepared nanoparticles was around 26 nm and mean diameter of annealed sample was around 10 nm as estimated by XRD technique and direct HRTEM observation. The ...
Fig. 2. XRD pattern of (a) starting material of Al2O3- 30 vol% cBN-10 vol% hBN, (b) Al2O3-30 vol% cBN-10 vol% hBN sample, (c) Al2O3-30 vol% cBN sample sintered at 1250 °C for 30 min. Fig. 3 shows the Raman spectra patterns of starting material of Al2O3-cBN-hBN...
X-ray diffraction (XRD) pattern indicates that LCMO and Al 2 O 3 coexisted in the composites, indicating that Al 2 O 3 is segregated outside the LCMO grains. Pure LCMO and its composites behaved as a paramagnetic state in room temperature. The T MI value has been suppressed in ...
XRD pattern of HFs (h). SEM and high-resolution SEM images of HFs (i-k). Table 1. Specific surface areas analysis results of the HFs, cotton and gauze. The specific surface area is about twice in HFs than cotton, which may be due to the hollow structure of HFs. Empty CellHFsCotton...
度范围内变化不大 .但随着焙烧温度的升高 ,吸附 圈5 不同温度焙烧 的催化剂的XRD谱 Fig5 XRDpatternsofa-AI2O3(1),Nb2O5。H2O (2),Nb2Os· 峰的峰面积逐渐降低 ,表 明催化剂表面的酸量逐渐 ”H2Ocalcinedat400℃(3)and700℃ (4),andNb2O5/ 降低,这与铌酸的酸量随着焙烧温度的升高而下 口rA...
图2 AgCuTip粉末钎料的XRD图谱 Figure 2 XRD pattern of powder fillers AgCuTi钎料及AgCuTip钎料的DSC曲线如图 3所示。从图 3可以看出,二者的固相线温度几乎一样,约为776 ℃,说明球磨过程以及纳米-Al2O3颗粒的添加整体上并不影响AgCuTi钎料的熔化特性. ...
2 (a) XRD pattern of A:Al2O3 as-grown crystal, (b) XRD patten of a single crystal Cr:Al2O3 specimen, (c) XRD pattern of the Cr:Al2O3 crystal, (104)-Bragg reflection(A) 0.5wt% Cr:Al2O3; (B) 1.0wt% Fe:Al2O3 grown form the feed rod sintered at 1350℃/4h; (C) ...
XRD pattern of the Al90-600 was shown in Fig. 2d as well. The primary diffraction peaks of the product are in good agreement with the standard data for the γ-Al2O3 (JCPDS card number 10-0425), and no other peaks resulting from reactants or intermediate phases are observed, indicating...
图2 不同温度反应后2o3 的XRD 谱图 Fig.2XRDpatternsofA1203afterCF4decomposition atdifferenttemperatures (a)825℃,(b)850oC,(c)900℃ 转型为Ot—A1.O..实验证实,Ot—A1.O.(比表面积4.45 m2?g)对于CF4 分解反应的活性极低.所以说,未反 应的—A1.O.转化为Ot—A1.O.,是活性快速下降的主 要...