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飞秒激光改性玻璃微结构的化学腐蚀特性研究
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作者 蒋鲁杰 戴能利 +2 位作者 王英 张继皇 陆培祥 《高等学校化学学报》 SCIE EI CAS CSCD 北大核心 2007年第6期1165-1168,共4页
采用飞秒激光改性-化学腐蚀的方法,分别研究了3种典型玻璃的化学腐蚀性能.通过测试材料的微观结构,分析了不同材料的腐蚀速率与脉冲能量及腐蚀时间的关系,从材料组成、显微结构及化学键特征讨论了玻璃改性-腐蚀机理.结果表明,飞秒激光... 采用飞秒激光改性-化学腐蚀的方法,分别研究了3种典型玻璃的化学腐蚀性能.通过测试材料的微观结构,分析了不同材料的腐蚀速率与脉冲能量及腐蚀时间的关系,从材料组成、显微结构及化学键特征讨论了玻璃改性-腐蚀机理.结果表明,飞秒激光改性后的碲酸盐和PbO硅酸盐玻璃不具有选择性腐蚀特性,而石英玻璃的选择性腐蚀比高于40;飞秒激光改性玻璃的选择性腐蚀特性与材料结构有关,分子体积大、网络结构不紧密的材料不具有选择腐蚀特性. 展开更多
关键词 飞秒激光 化学腐蚀 玻璃微结构
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氧化钡对铁磷酸盐玻璃结构和性能的影响研究 被引量:2
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作者 王翠玲 梁晓峰 +3 位作者 杨世源 李海建 于慧君 杨德芹 《中国陶瓷》 CAS CSCD 北大核心 2015年第11期27-30,共4页
为研究Ba O对铁磷酸盐玻璃结构和性能的影响,采用熔融淬冷法制备x Ba O-(100-x)(40Fe2O3-60P2O5)(其中x=0、5、10、20、30、40 mol%)系列玻璃。利用X射线衍射(XRD)、拉曼光谱(Raman)和综合热分析(DTA)等测试手段表征样品结构和性能,并... 为研究Ba O对铁磷酸盐玻璃结构和性能的影响,采用熔融淬冷法制备x Ba O-(100-x)(40Fe2O3-60P2O5)(其中x=0、5、10、20、30、40 mol%)系列玻璃。利用X射线衍射(XRD)、拉曼光谱(Raman)和综合热分析(DTA)等测试手段表征样品结构和性能,并测试玻璃样品的密度和维氏硬度。结果研究表明,当Ba O含量小于30 mol%时,样品为均质玻璃;当Ba O含量大于等于30 mol%时,样品中析出类无水钾镁矾矿物(化学式:KBa Fe2(PO4)3,JCPDS:#78-2334)晶相;同时,Raman光谱表明伴随Ba O含量的增加,玻璃微结构从Q1转变到Q2和Q0,由于Ba O含量的增加导致玻璃样品网络结构更致密,宏观表现为密度(ρ)和维氏硬度(H)增加,摩尔体积(Vm)减小;样品玻璃转化温度(Tg)随Ba O含量的增加而增加,玻璃形成能力(Kgl)和抗析晶能力(ΔTTS)随Ba O的添加先增大后减小,这与XRD测试结果相一致。 展开更多
关键词 铁磷酸盐玻璃 氧化钡 玻璃微结构 性能
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溶胶-凝胶法制备TiO_2-SiO_2-GeO_2玻璃的研究
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作者 敬承斌 陈文梅 +2 位作者 杨尊先 赵修建 韩建军 《玻璃与搪瓷》 CAS 北大核心 2001年第3期16-19,共4页
以GeCl4 为原料合成了 3-三氯锗丙酸 ,再以正硅酸乙酯、钛酸丁酯、3-三氯锗丙酸为前驱物 ,采用溶胶 -凝胶法制备了TiO2 -SiO2 -GeO2 玻璃。利用DTA、TG、XRD研究TiO2 -SiO2 -GeO2 溶胶向玻璃的转化 ,利用XPS研究了TiO2 -SiO2 -GeO2
关键词 溶胶-凝胶法 TiO2-SiO2-GeO2玻璃 溶胶 玻璃转化 玻璃微结构 二氧化钛 二氧化硅 二氧化锗
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基于数字全息的玻璃微加工形貌测量 被引量:2
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作者 李伟霞 黄素娟 闫成 《光子学报》 EI CAS CSCD 北大核心 2021年第9期24-35,共12页
利用数字全息显微技术对玻璃微加工中微结构的形貌进行了高精度测量,基于马赫-曾德离轴显微干涉系统记录微结构的数字全息图,用混合重建算法和行列扫描法解包裹提取高精度的相位分布,进而构建微结构的形貌,并计算了深度。对平凸球形微... 利用数字全息显微技术对玻璃微加工中微结构的形貌进行了高精度测量,基于马赫-曾德离轴显微干涉系统记录微结构的数字全息图,用混合重建算法和行列扫描法解包裹提取高精度的相位分布,进而构建微结构的形貌,并计算了深度。对平凸球形微透镜进行了形貌仿真与测量,验证了该方法的可行性。用二氧化碳激光器对载玻片表面进行光刻微加工,定量分析了不同光刻参数对玻璃微结构的形貌及深度的影响,以及加工热影响区引起的重凝高度对加工质量的影响。结果表明,光刻深度随着激光功率的增大而增大,随着打标速度的减小而增大,Q频较小时深度较大。这有助于指导玻璃的精细加工。 展开更多
关键词 数字全息 形貌 玻璃微结构 光刻参数 微加工
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玻璃基环形振动微陀螺谐振子的设计与制造工艺 被引量:1
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作者 王风娇 李新坤 +3 位作者 吴浩越 刘福民 徐宇新 王学锋 《飞控与探测》 2020年第1期75-79,共5页
针对传统单晶硅材料热胀系数不稳定引起的硅基环形振动微陀螺的温度漂移问题,开展了玻璃基环形振动微陀螺谐振子的设计,并提出了一种新型的玻璃基准三维微结构制造工艺,借助微型电子机械系统(MEMS)工艺中成熟的深硅刻蚀、阳极键合、化... 针对传统单晶硅材料热胀系数不稳定引起的硅基环形振动微陀螺的温度漂移问题,开展了玻璃基环形振动微陀螺谐振子的设计,并提出了一种新型的玻璃基准三维微结构制造工艺,借助微型电子机械系统(MEMS)工艺中成熟的深硅刻蚀、阳极键合、化学机械抛光等通用加工技术,融合玻璃熔融工艺,解决了玻璃基准三维微结构的制造工艺难题,同时保证了高的加工精度,实现了玻璃基环形振动微陀螺谐振子的高精度批量制造。 展开更多
关键词 环形振动微陀螺 玻璃基准三维微结构 MEMS工艺
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Effect of minor-addition of Fe on structural and mechanical properties of CuZrAl bulk metallic glass 被引量:2
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作者 许宏伟 杜宇雷 邓昱 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第5期1123-1126,共4页
The CuZrAl bulk metallic glass with minor-addition of Fe was prepared by rapid quenching method. The structures were examined by X-ray diffraction (XRD). The effect of Fe on the glass-forming ability was studied by ... The CuZrAl bulk metallic glass with minor-addition of Fe was prepared by rapid quenching method. The structures were examined by X-ray diffraction (XRD). The effect of Fe on the glass-forming ability was studied by differential scanning calorimetry (DSC). The minor-addition of Fe obviously extends the supercooled liquid region ΔTx. The plastic strain of the Cu44Zr48Al7Fe bulk metallic glass is about 1.5%. The microstructures were examined by transmission electron microscopy (TEM). It is found that when 1%-2% Fe (mole fraction) were introduced into the CuZrAl alloy matrix, nanoscale phase separation occurs in the as-prepared Cu44Zr48Al7Fe bulk metallic glass. 展开更多
关键词 bulk metallic glass microstructure mechanical property phase separation Fe addition
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Comparison of Morphological Microstructure of Vitrified and Normal Shoots of Aronia melanocarpa Elloit 被引量:2
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作者 高晔华 利爽 +2 位作者 吕天舒 胡婷婷 吴荣哲 《Agricultural Science & Technology》 CAS 2014年第10期1667-1670,1683,共5页
The Aronia melanocarpa El oit was used as test material. The microstruc-ture of normal and vitrified shoots and the characteristics of their stomas on leaf surface were compared by paraffin section and leaf epidermis-... The Aronia melanocarpa El oit was used as test material. The microstruc-ture of normal and vitrified shoots and the characteristics of their stomas on leaf surface were compared by paraffin section and leaf epidermis-tearing method. The results showed the palisade tissue of Aronia melanocarpa El oit consists of 2-3 lay-ers of cells. The stomas on lower epidermis cave in, and are smal and dense. There are abundant vessels and sieve tubes in stems. ln contrast, the main veins of vitrified shoots are unobvious, messy and irregular. The boundary between pal-isade tissue and spongy tissue is not obvious. The stomas open circularly and bigly. The stems are swel ing and thick, but the pith parenchyma cells are broken. 展开更多
关键词 Aronia melanocarpa El oit Morphological microstructure Normal shoot Vitrified shoot
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Glass forming ability and mechanical properties of Nb-containing Cu-Zr-Al based bulk metallic glasses 被引量:4
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作者 M.ABBASI R.GHOLAMIPOUR F.SHAHRI 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第7期2037-2041,共5页
Mechanical properties of (Cu50Zr43Al7)100 Nbx (x=0,1,3,6,9) bulk metallic glasses rods with a diameter of 2.5 mm prepared by suction casting method were studied. The results of uniaxial compression tests at room t... Mechanical properties of (Cu50Zr43Al7)100 Nbx (x=0,1,3,6,9) bulk metallic glasses rods with a diameter of 2.5 mm prepared by suction casting method were studied. The results of uniaxial compression tests at room temperture show that the best mechanical properties of 2.8% and 1.98 GPa for plastic strain and fracture strength, respectively, in the sample with x=3. Microstructure, fracture surface and shear bands of the samples were observed by SEM and XRD methods. 展开更多
关键词 bulk metallic glass microstructure shear bands mechanical properties
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Microstructure and microwave dielectric properties of lead borosilicate glass ceramics with Al_2O_3 被引量:4
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作者 韦鹏飞 周洪庆 +2 位作者 王杰 张一源 曾凤 《Journal of Central South University》 SCIE EI CAS 2011年第6期1838-1843,共6页
The effects of Al2O3 addition on both the sintering behavior and microwave dielectric properties of PbO-B203-SiO2 glass ceramics were investigated by Fourier transform infrared spectroscope (FTIR), differential ther... The effects of Al2O3 addition on both the sintering behavior and microwave dielectric properties of PbO-B203-SiO2 glass ceramics were investigated by Fourier transform infrared spectroscope (FTIR), differential thermal analysis (DTA), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results show that with the increase of Al2O3 content the bands assigned to [SiO4] nearly disappear. Aluminum replaces silicon in the glass network, which is helpful for the formation of boron-oxygen rings. The increase of the transition temperature Tg and softening temperature Tf of PbO-B2O3-SiO2 glass ceramics leads to the increase of liquid phase precipitation temperature and promotes the structure stability in the glasses, and consequently contributes to the decreasing trend of crystallization. Densification and dielectric constants increase with the increase of Al2O3 content, but the dielectric loss is worsened. By contrast, the 3% (mass fraction) Al2O3-doped glass ceramics sintered at 725℃ have better properties of density p=2.72 g/cm3, dielectric constant Er=6.78, dielectric loss tan8=2.6×10^-3 (measured at 9.8 GHz), which suggest that the glass ceramics can be applied in multilayer microwave devices requiring low sintering temperatures. 展开更多
关键词 PbO-B203-SiO2 glass ceramics AL2O3 Fourier transform infrared spectroscope MICROSTRUCTURE dielectric properties
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The relationship between IR characteristic peak and microstructure of the glass used as optical fiber 被引量:4
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作者 段吉安 蔡国华 帅词俊 《Journal of Central South University of Technology》 2006年第3期238-241,共4页
Based on the harmonic vibration equation, the relationship between IR characteristic peak of fiberglass and Si-O-Si bond angle was deduced, and 1 100 cm^-1 characteristic peak was specifically studied. It is found tha... Based on the harmonic vibration equation, the relationship between IR characteristic peak of fiberglass and Si-O-Si bond angle was deduced, and 1 100 cm^-1 characteristic peak was specifically studied. It is found that 1 100 cm^-1 characteristic peak shifts to higher wave number when Si-O-Si bond angle increases. Taking fused biconical taper (FBT) coupler as an example, the microstructures of the fiber coupler manufactured at different draw- ing speeds were tested with micro infrared spectrum. According to the test results, it is found that the bond angle at the taper region is the largest, the one at the fused region is the second largest, and the one of bare fiber is the smal- lest. The characteristic peaks of fused-taper region shift to higher wave number when drawing speed increases. 展开更多
关键词 FIBERGLASS IR spectroscopic MICROSTRUCTURE
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Effect of nucleating agents on microstructure and mechanical properties of SiO_2-Al_2O_3-ZrO_2 glass-ceramics 被引量:1
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作者 余丽萍 肖汉宁 胡鹏飞 《Journal of Central South University of Technology》 EI 2005年第5期507-510,共4页
SiO2-Al2O3-ZrO2 glasses with different nucleating agents were crystallized under special processing schedule. The microstructure and mechanical properties of the glass-ceramics in SiO2-Al2O3-ZrO2 system were investiga... SiO2-Al2O3-ZrO2 glasses with different nucleating agents were crystallized under special processing schedule. The microstructure and mechanical properties of the glass-ceramics in SiO2-Al2O3-ZrO2 system were investigated by differential scanning calorimetry, scanning electron microscopy, X-ray diffraction and three-point bending method. The results show that ZrO2 is not an effective nucleating agent in SiO2-Al2O3-ZrO2 system, while TiO2 is effective for the separation of spinel, and P2O5 facilitates solubility of ZrO2 in glass and crystallization. The main crystalline phases of the glass-ceramics are spinel, anorthite and tetragonal zirconia. With the increase of ZrO2 content in the glass, glass-ceramics show higher bending strength (120MPa) than others. 展开更多
关键词 GLASS-CERAMICS SiO2-Al2O3-ZrO2 system microstructure mechanical property
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Microstructure and microwave dielectric properties of CaO-B_2O_3-SiO_2 glass ceramics with various B_2O_3 contents 被引量:8
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作者 韦鹏飞 周洪庆 +2 位作者 朱海奎 戴斌 王杰 《Journal of Central South University》 SCIE EI CAS 2011年第5期1359-1364,共6页
The effects of B2O3 addition on both the sintering behavior and microwave dielectric properties of CaO-B2O3-SiO2 (CBS) glass ceramics were investigated by Fourier transform infrared spectroscopy (FTIR), X-ray diff... The effects of B2O3 addition on both the sintering behavior and microwave dielectric properties of CaO-B2O3-SiO2 (CBS) glass ceramics were investigated by Fourier transform infrared spectroscopy (FTIR), X-ray diffractometry (XRD) and scanning electron microscopy (SEM). The results show that the increasing amount of B203 causes the increase of the contents of [BO3], [BO4] and [SiO4], which deduces the increase of CaB204 and a-SiO2 and the decrease of CaSiO3 correspondingly. No new phase is observed throughout the entire experiments. A bulk density of 2.54 g/cm3, a thermal expansion coefficient value of 11.95× 10-6 ℃-1 (20-500℃), a dielectric constant er value of 6.42 and a dielectric loss tanδ value of 0.000 9 (measured at 9.7 GHz) are obtained for CBS glass ceramics containing 35%-B203 (mass fraction) sintered at 850 ℃ for 15 min. 展开更多
关键词 CAO-B2O3-SIO2 B2O3 content Fourier transform infrared spectroscopy MICROSTRUCTURE dielectric properties
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Effects of ZrO_2 on the Microstructure of a Mica Glass-ceramic 被引量:1
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作者 秦小梅 孙祥云 +1 位作者 修稚萌 左良 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2004年第10期1111-1116,共6页
The effects of ZrO2 on the crystallinity of mica and microstructure of a machina- ble glassceramic were studied. It was found that ZrO2 is an effective nucleation agent in mica glass- ceramics. Stabilized by Ca2+, a l... The effects of ZrO2 on the crystallinity of mica and microstructure of a machina- ble glassceramic were studied. It was found that ZrO2 is an effective nucleation agent in mica glass- ceramics. Stabilized by Ca2+, a lot of t--ZrO2 particles precipitate from ZrO2-mica glass-ceramics. The ZrO2 particles can effectively limit the growth of mica crystal and benefit the mechanical properties of glass-ceramics. 展开更多
关键词 MICROSTRUCTURE CRYSTALLIZATION ZRO2 MICA GLASS-CERAMIC
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Structural characteristics and dielectric properties of glass-ceramic nanocomposites of(Pb,Sr)Nb_2O_6-NaNbO_3-SiO_2 被引量:3
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作者 王磊 张庆猛 杜军 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2010年第8期1434-1438,共5页
The structure and dielectric properties of (Pb,Sr)Nb2O6-NaNbO3-SiO2 glass-ceramics with different Pb and Sr contents were investigated. The XRD pattern of glass-ceramics without Sr substitution is different from tha... The structure and dielectric properties of (Pb,Sr)Nb2O6-NaNbO3-SiO2 glass-ceramics with different Pb and Sr contents were investigated. The XRD pattern of glass-ceramics without Sr substitution is different from that with Sr substitution, which indicates the existence of orthorhombic phase in the latter ones. TEM bright field observation shows nanosized microstructures, while for samples with Sr, typical eutectic microstrncture with separated crystallized bands is found in the glass matrix. Dielectric properties measurement of the samples indicates an obvious improvement of dielectric constant, dielectric loss, DC field and temperature dependence of dielectric constant when the molar ratio of Sr to Pb is 4:6. 展开更多
关键词 dielectric properties NANOCOMPOSITE (Pb Sr)Nb2O6 NaNbO3 GLASS-CERAMICS
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Effects of various fillers on sintering, microstructures and properties of Ca-Ba-Al-B-Si-O glass/ceramic composites 被引量:3
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作者 刘明 周洪庆 +2 位作者 刘敏 岳振星 朱海奎 《Journal of Central South University》 SCIE EI CAS 2014年第3期843-848,共6页
Low-temperature sintering and properties of LTCC (low temperature co-fired ceramics) materials based on CaO-BaO-Al2O3-B2O3-SiO2 glass and various fillers such as Al2O3, silica glass, christobalite, AlN, ZrO2, MgO-Si... Low-temperature sintering and properties of LTCC (low temperature co-fired ceramics) materials based on CaO-BaO-Al2O3-B2O3-SiO2 glass and various fillers such as Al2O3, silica glass, christobalite, AlN, ZrO2, MgO-SiO2, TiO2 were investigated. The results show that densification, crystallization, microstructures and dielectric properties of the composites are found to strongly depend on the type of filler. The densification process of glass/ceramic composites with various fillers is mainly from 600 ℃ to 925 ℃, and the initial compacting temperature of samples is 600 ℃. The initial rapid densification of samples starts at its glass softening temperature. LTCC compositions containing Al2O3, silica glass, AlN and MgO-SiO2 fillers start to have the crystallization peaks at 890, 903, 869 and 844 ℃, respectively. The crystallization peaks are believed as correlated to the crystallization of CaAl2SiO8, β-SiO2, Ca2Al2SiO7 and β-SiO2. The composite ceramic with Al2O3, silica glass and TiO2 ceramic have a better dense structure and better smooth fracture surface. Sample for Al2O3 has the lowest dielectric loss tanδ value of 0.00091, whereas the sample for MgO.SiO, has the highest dielectric loss tanδ value of 0.02576. The sample for TiO2 has the highest dielectric constant value of 14.46, whereas the sample for AIN has the lowest dielectric constant value of 4.61. 展开更多
关键词 borosilicate glass softening temperature FILLER microstructures SINTERING dielectric properties
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Relationship of glass forming ability and local structural properties of liquid Cu-Zr alloys
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作者 李敬芬 刘长松 《Journal of Chongqing University》 CAS 2011年第2期51-59,共9页
Molecular dynamics(MD) simulations were performed to investigate the glass forming ability(GFA) and microscopic structural properties of liquid Cu-Zr alloys.Based on the analysis of composition dependences of the redu... Molecular dynamics(MD) simulations were performed to investigate the glass forming ability(GFA) and microscopic structural properties of liquid Cu-Zr alloys.Based on the analysis of composition dependences of the reduced glass transition temperatures and the excess volume,we found that the Cu-Zr glasses have the largest GFA at Cu65Zr35 composition.To get more detailed information of local structure,we calculated the pair correlation functions,partial pair correlation functions,the excess entropy,chemical order parameter,coordination number,and Voronoi index of Cu-Zr liquids.We found that there exists an obvious and close relationship among the GFA,the excess entropy calculated using the total pair correlation functions,chemical order parameters,and some Cu centered cluster with Voronoi index <0,2,8,1> and Zr centered cluster with Voronoi index <0,3,6,4>,which all have nonlinear dependences on Cu/Zr concentration and have extreme values at liquid Cu65Zr35 composition. 展开更多
关键词 bulk metallic glass glass forming ability microscopic structure molecular dynamics simulation
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Microstructure and Magnetic Properties of Sputtered Co5Sm Films
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作者 马丽 甄聪棉 +1 位作者 庞兆广 侯登录 《Journal of Measurement Science and Instrumentation》 CAS 2011年第4期317-320,共4页
Co5 Sm/Cr bilayer films were deposited on Si and glass slides by means of a Direct-Current (DC) magnetron sputtering system with substrate heating. Magnetic properties measurements show that the sample with glass su... Co5 Sm/Cr bilayer films were deposited on Si and glass slides by means of a Direct-Current (DC) magnetron sputtering system with substrate heating. Magnetic properties measurements show that the sample with glass substrate has a comparatively large coercivity (He = 2 141.20e) with a rela- tively low optimal temperature ( Ts =350 ℃ ). X-ray diffraction patterns indicate that Cr presents a hexagonal-close-packed (hcp) texture on Si, while a body-centered-cubic (bcc) struc- ture on glass substrate, which leads to Cos Sm films having dif- ferent lattice constants on Si and glass substrates. At their opti- mal temperature, the grain size of the sample on glass slide is smaller with its size distribution more uniform. Concurrently, the shape of magnetic domain is more regular and ordered. The value of magnetic switching volume ( V ) for the film on glass is 1.65×10-18 cm3 , smaller than that for films on Si. For the film on glass, the magnetization reversal mechanism is mainly influenced by magnetocrystalline anisotropy, the shape of the crystal grain and the stress in the film. 展开更多
关键词 magnetic recording media magnetron sputtering Co5 Sm SUBSTRATE
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Morphological and ultrastructural changes in rat ovarian tissues after cryopreservation
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作者 Rumana Jafarey 《The Chinese-German Journal of Clinical Oncology》 CAS 2012年第9期527-532,共6页
Objective: The aim of the study was to observe and compare the effects of cryopreservation and thawing meth- ods on rat ovarian tissues. Methods: Twenty 5-6 weeks old SPF-SD female rats were randomly divided into two ... Objective: The aim of the study was to observe and compare the effects of cryopreservation and thawing meth- ods on rat ovarian tissues. Methods: Twenty 5-6 weeks old SPF-SD female rats were randomly divided into two groups, with ten rats in each group. Freshly isolated ovaries saved as a control (group 1: fresh ovaries) in formalin-fixed or vitrified immediately after dissection (group 2: vitrified ovaries). Ovaries in vitrified group were processed into thin slices then cryo- preserved, stored in liquid nitrogen for 21 days, rapidly thawed and grossly examined. All of the collected ovaries underwent hematoxylin and eosin-stained paraffin serial sections and observed the microscopic evaluation in vitrified ovaries. Results: Grossly the vitrified ovaries turned pale color and the size was same as before freeze. The vitrified ovarian tissue had normal anatomical structures of cortex and medulla under the microscope and had no difference with the fresh control ovarian tis- sue. The number and distribution of the follicles were similar with the fresh ovarian tissue, but had smaller size and the gap between oocyte and the surrounding granulosa cells was increased. Few ooctyes were in irregular appearance however the morphology of follicular cells did not give a different appearance as compared to the fresh control ovarian tissue. Conclusion: Cryopreservation of ovarian tissues by vitrification method has some detrimental effect on the morphology of follicles but does not induce negative impact on the number, density and survival of the primordial ovarian follicles. However the whole follicle anatomical structures also had no significant changes. 展开更多
关键词 CRYOPRESERVATION thawing ovarian tissue MORPHOLOGY
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Compositional dependence of microstructure and tribological properties of plasma sprayed Fe-based metallic glass coatings 被引量:4
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作者 YANG Qin LI Ran +3 位作者 LIU ZengQian SHI MinJie LUO XueKun ZHANG Tao 《Science China(Technological Sciences)》 SCIE EI CAS 2012年第5期1335-1342,共8页
Gas-atomized powders of three Fe-based glass-forming alloys were sprayed on mild steel substrates by atmospheric plasma spaying using the same spaying parameters. Microstructures, thermal stabilities and tribological ... Gas-atomized powders of three Fe-based glass-forming alloys were sprayed on mild steel substrates by atmospheric plasma spaying using the same spaying parameters. Microstructures, thermal stabilities and tribological properties of the sprayed coatings were analyzed. The coating performances showed a strong dependence on the intrinsic characters of the compositions, i.e., glass-forming ability (GFA) and supercooled liquid region (ATx). The coatings tended to exhibit higher amorphous phase fraction for the composition with higher GFA and lower porosity for that with larger ATX. All the coatings exhibited superior wear resistance compared with the substrate. Higher wear resistance could be obtained in coatings with higher amorphous phase fraction, i.e. higher GFA of the composition. This study has important implications for composition selecting and optimizing in the fabrication of metallic glass coatings. 展开更多
关键词 metallic glasses MICROSTRUCTURE RAPID-SOLIDIFICATION coating materials X-ray diffraction
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Manufacture of porous metallic glass using dissolvable templates
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作者 Jianan Fu Zhen Li +10 位作者 Zehang Liu Xin Li Wenxin Wen Fei Sun Luyao Li Jinbiao Huang Wenqing Ruan Shuai Ren Zhenxuan Zhang Xiong Liang Jiang Ma 《Science China Materials》 SCIE EI CAS CSCD 2022年第10期2833-2841,共9页
A facile,precise,and controllable manufacturing technology is desired for hierarchical functional surfaces.In this work,we successfully manufactured porous metallic glass using a water-dissolution material as template... A facile,precise,and controllable manufacturing technology is desired for hierarchical functional surfaces.In this work,we successfully manufactured porous metallic glass using a water-dissolution material as template and the excellent thermoplastic property of metallic glass.The prepared micro/nanostructures have excellent tunability,and the proposed approach can be used to prepare large-area disordered porous structures and ordered regular arrays with nanoscale replication accuracy.In particular,the disordered porous structure prepared by the dissolvable template strategy exhibits a water contact angle of~140°and an oil contact angle of~0°,making it suitable for oil/water separation.It also shows stable wettability after being soaked in strong acid or alkali environments and maintains a~130°water contact angle and a~4°oil contact angle even after severe wear.The proposed strategy also possesses excellent recycling properties.We reconstructed porous structures on the same surface three times and found no significant change in wettability for each reconstructed porous structure.Our research provides a facile and controllable approach for the preparation of hierarchical porous structures and paves the way for the design of other functional surfaces. 展开更多
关键词 dissolvable templates metallic glass porous structure WETTABILITY recycling properties
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