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| 1 | Influence of MoSi_(2) on oxidation protective ability of TaB_(2)-SiC coating in oxygen-containing environments within a broad temperature range显示文摘TaB_(2)-SiC coating modified by different content of MoSi_(2) was fabricated on graphite substrate with SiC inner coating by liquid phase sintering to elevate the anti-oxidation capability of the TaB_(2)-SiC coatings.As compared to the sample with the TaB_(2)-40wt% SiC coating,the coating sample modified with MoSi_(2) exhibited a weight gain trend at lower temperatures,the fastest weight loss rate went down by 76%,and the relative oxygen permeability value reduced from about 1% to near 0.More importantly,the large amount of SiO_(2) glass phase produced over the coating during oxidation was in contact with the modification of MoSi_(2),which was proved to be beneficial to the dispersion of Ta-oxides.A concomitantly formed continuous Ta-Si-O-B compound glass layer showed excellent capacity to prevent oxygen penetration.However,when the TaB_(2) content was sacrificed to increase the MoSi_(2) content,the relative oxygen permeability of the coating increased instead of decreased.Thus,on the basis of ample TaB_(2) content,increasing the MoSi_(2) content of the coating is conducive to reducing the relative oxygen permeability of the coatings in a broad temperature region. | Xuanru REN Junshuai LV Wei LI Yuwen HU Ke SUN Can MA Hong’ao CHU Weiguang WANG Leihua XU Ziyu LI Peizhong FENG | 2020 | Journal of Advanced Ceramics2020，9，6： | 4 |
| 2 | 炭/炭复合材料 SiC /Mo( Six、Al1-x)2抗氧化涂层( 英文)显示文摘为了提高炭/炭(C/C)复合材料的高温抗氧化性能,应用多相反应技术在C/C复合材料表面制备SiC/Mo(Six、Al1-x)2复合涂层。利用扫描电镜、电子能谱、X射线衍射仪等测试手段对涂层材料的微观结构和物相组成进行分析,同时研究涂层C/C复合材料在超音速气流中的抗氧化性能。结果表明,C/C复合材料表面形成的抗氧化涂层显示出明显的双层结构,从外向内分别为Mo(Six、Al1-x)2与SiC的复合层和纯SiC层,同时有少量的Mo4.8Si3C0.6存在于涂层中。在温度为1800K、气体速率1500m/s的超音速气流中氧化冲刷96 s,以及在2550 K和室温下热循环24次的测试条件下,制备的SiC/Mo(Six、Al1-x)2涂层材料均未发生破坏现象。涂层材料优良的抗氧化性能和抗热震性能主要归因于基体C/C复合材料的高强度以及在氧化过程中材料表面形成的连续稳定的SiO2和Al2O3玻璃相。 | 王向辉 翁力 张伟刚 | 2014 | 新型炭材料2014，29，2： | 3 |
| 3 | ZrB2材料的制备工艺与应用显示文摘ZrB2陶瓷材料具有耐高温、抗热震、抗氧化的特性,且在超高温陶瓷中具有较低的理论密度,使其成为航空航天等超高温领域中最具吸引力的材料之一。本文分别就ZrB2材料的结构性能、高温氧化机制、粉体合成、复合材料及其涂层的制备工艺等方面进行了综述。 | 陈琪 李同起 张大海 马峻峰 | 2020 | 硅酸盐通报2020，39，3： | 2 |
| 4 | Preparation of ZrB_(2)-MoSi_(2) high oxygen resistant coating using nonequilibrium state powders by self-propagating high-temperature synthesis显示文摘To achieve high oxygen blocking structure of the ZrB_(2)-MoSi_(2) coating applied on carbon structural material,ZrB_(2)-MoSi_(2) coating was prepared by spark plasma sintering(SPS)method utilizing ZrB_(2)-MoSi_(2) composite powders synthesized by self-propagating high-temperature synthesis(SHS)technique as raw materials.The oxygen blocking mechanism of the ZrB_(2)-MoSi_(2) coatings at 1973 K was investigated.Compared with commercial powders,the coatings prepared by SHS powders exhibited superior density and inferior oxidation activity,which significantly heightened the structural oxygen blocking ability of the coatings in the active oxidation stage,thus characterizing higher oxidation protection efficiency.The rise of MoSi_(2) content facilitated the dispersion of transition metal oxide nanocrystals(5-20 nm)in the SiO_(2) glass layer and conduced to the increasing viscosity,thus strengthening the inerting impact of the compound glass layer in the inert oxidation stage.Nevertheless,the ZrB_(2)-40 vol% MoSi_(2) coating sample prepared by SHS powders presented the lowest oxygen permeability of 0.3% and carbon loss rate of 0.29×10^(6)g·cm^(-2)·s^(-1).Owing to the gradient oxygen partial pressure inside the coatings,the Si-depleted layer was developed under the compound glass layer,which brought about acute oxygen erosion. | Menglin ZHANG Xuanru REN Mingcheng ZHANG Songsong WANG Li WANG Qingqing YANG Hongao CHU Peizhong FENG | 2021 | Journal of Advanced Ceramics2021，10，5： | 2 |
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