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Structure and properties of ceramic preforms based on Al2O3 particles
Composites Ceramic preforms TGA analysis
2009/12/14
Purpose: The main goal of this project is to elaborate and optimize the method of manufacturing the porous, ceramic preforms based on Al2O3 particles used as the reinforcement in order to produce mode...
Structure of TiBN coatings deposited onto cemented carbides and sialon tool ceramics
Tool materials Thin & Thick coatings Sialon
2009/12/3
Purpose: The aim of this paper was investigated structure of sintered carbides WC-Co type and sialon tool ceramics with wear resistance ternary coatings TiBN type deposited by cathodes arc evaporation...
Thermal diffusivity of RE2Zr2O7 - type ceramic powders intended for TBCs deposited by APS
Metallic alloys Thin&thick coatings TBC
2009/12/3
Purpose: The aim of this paper is to provide overall characteristics of the Laser-Flash method and to determine the thermal diffusivity of powders intended for thermal spraying of thermal barrier coat...
Experimental investigation of viscosity and thermal conductivity of suspensions containing nanosized ceramic particles
I. Tavman A. Turgut M. Chirtoc H.P. Schuchmann S. Tavman
2009/12/2
Purpose: In this study we report measurements of effective thermal conductivity by using 3ω method
and effective viscosity by vibro-viscometer for SiO2-water and Al2O3-water nanofluids at different p...
Characterization of Ba1-xNaxTi1-xNbxO3 ceramic by dielectric spectroscopy
Ceramics Electrical properties Dielectric spectroscopy method
2009/12/2
Purpose: The purpose of this paper was characterization of electric properties of polycrystalline nanograin solid
solution of Ba1-xNaxTi1-xNbxO3, x = 0.65 (BNTN65) within the temperature range 153 K-...
The analysis of strength properties of ceramic preforms for infiltration process
Porous ceramics Si3N4 Alumina carbonitride
2009/12/2
Purpose: The goal of this work is the optimization of sintering process of the ceramic preforms based on Si3N4 and Al2O3-Ti(C,N) materials. The influence of pore forming additives on porosity, microst...
Fabrication and characterization of TiAl/Ti3Al-based intermetallic composites (IMCs) reinforced with ceramic particles
Composites TiAl
2009/12/2
TiAl/Ti3Al-based alloys have several advantages over conventional titanium alloys, such as higher elastic modulus, lower density, better mechanical properties at elevated temperatures, and higher oxid...
采用传统固相反应法制备Ba6−3x(La1−mBim)8+2x(Ti0.95Zr0.05)18O54(x=2/3)微波介质陶瓷，研究Bi掺杂对Ba6−3xLa8+2x(Ti0.95Zr0.05)18O54(x=2/3)陶瓷的烧结性能、微观结构以及介电性能的影响。结果表明：当0＜m＜0.4时，Bi3+取代A1位的La3+生成单相类钨青铜型固溶体；当Bi3+的掺杂量...
为了进一步提高 T i A l 合金表面等离子喷涂 A l2O3-13 % T i O2( 质 量分数, 下 同 ) 复 合陶瓷 涂层的 抗冲蚀 性能,采用激光重熔工艺对涂 层进行处理, 研究了激光重熔对 涂层微 观组织 和抗冲 蚀性能的 影响, 并讨论 了陶瓷 涂层的冲蚀机理。结果表明, 激光重熔处理会形成致密细小 的等轴 晶重熔 区, 导致涂层 有更好 的抗冲 蚀性能。激 光重熔试样仍表现为典...
采用共挤压技术制备具有蜂窝状结构的NiFe2O4-10NiO/xNi型金属陶瓷材料，研究其共挤压特征，并通过对比蜂窝结构材料与均匀体材料试样间力学性能的差异，分析蜂窝结构NiFe2O4-10NiO/xNi材料的增韧特性。研究结果表明，与均匀体材料相比，蜂窝状结构材料NiFe2O4-10NiO/xNi无论在横截面还是在纵截面上均能够更有效地提高材料的断裂韧性，同时，其纵截面上的增韧效果要比其横截面的...
研究了5%Ni- NiFe2O4金属陶瓷惰性阳极在冰晶石-氧化铝熔体中的腐蚀行为及电解参数对腐蚀率的影响。研究结果表明:当Al2O3质量分数大于5%或接近饱和时,电极腐蚀率较低;当Al2O3质量分数小于2%时,电极腐蚀加快;当在冰晶石熔体中不加Al2O3时,会发生灾变腐蚀;当分子比为2.2~2.4,电解温度为960℃时,腐蚀率较低;溶解的铝和高电流密度对惰性阳极的正常工作不利,电流密度适当时有利于...
采用有机泡沫浸渍法制备粉煤灰泡沫陶瓷。为获得良好的挂浆性能，研究pH值、分散剂、流变剂和固相含量等因素对粉煤灰泡沫陶瓷水基浆料流动性、稳定性及触变性的影响，并对其作用机理进行分析。研究结果表明：浆料的黏度受pH值的影响比较显著，当pH值约为11时，浆料黏度最低，流动性最好；粉煤灰水基浆料的黏度随剪切速率增加而减小，随固相含量增大而增大，而且具有明显的时间依附性；当分散剂用量为0.5%，流变剂加入量...
采用传统粉末冶金技术制备了铝电解用Cu- NiFe2O4和Ni- NiFe2O4金属陶瓷惰性阳极,并对其在Na3AlF6-Al2O3 熔体中的腐蚀行为进行了研究。研究结果表明: NiFe2O4基金属陶瓷阳极的腐蚀行为与热力学计算结果吻合;金属Cu与NiFe2O4陶瓷的润湿性能不好,Cu- NiFe2O4金属陶瓷的致密化和导电性能难以提高;致密度过低时,会导致金属相高温氧化和电解质浸渗,电极肿胀、开...
NiFe2O4基金属陶瓷的高温抗氧化性
铝电解 NiFe2O4基金属陶瓷 抗氧化性 相对密度
2009/8/27
采用等温热重法,测试了NiFe2O4基金属陶瓷在1 000℃时的抗氧化性能,研究了材料相对密度、金属相成分及含量对其抗氧化性能的影响,探讨了金属陶瓷氧化过程的动力学。研究结果表明:当NiFe2O4基金属陶瓷的氧化层厚度增长到一定程度后,随时间的延长其厚度变化渐趋缓慢;当金属相含量在5%~20%范围时,材料的高温抗氧化性能主要受其相对密度影响,与金属相成分及含量无关,提高金属陶瓷的致密度有利于提高其...