摘要:

Yttria‐stabilized zirconia (YSZ)/Al2O3laminar microcomposites with a total of 80 layers, each as thin as ∼2 μm, were fabricated by electrophoretic deposition. Positively charged YSZ or Al2O3powders were deposited on a cathode, layer by layer from 10 wt% solids/ethanol suspensions. The suspensions were characterized by their rate of deposition as a function of voltage. The deposited samples had a green density of ∼60% of theoretical. The microstructure of the sintered, theoretically dense samples was characterized by optical and electron microscopy, and microindentation was used to explore the mechanical prop

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1992.tb05531.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

The effect of additives on the growth of silver particles in a lead borosilicate glass was studied. Growth of silver particles was expressed by the Ostwald ripening theory and controlled by diffusion. Addition of palladium retarded the growth of silver particles. This is attributed to the reduced activity of silver caused by the formation of silver–palladium solid solutions. Addition of ruthenium dioxide promoted the growth, whereas addition of tin dioxide had almost no effect on the growth rate. A “solubility parameter” was introduced to evaluate the temperature dependence of solubility of silver in glass, and the effect of additives has been discussed. Association of diffusion species has been proposed as a possible factor responsible for the temperature dependence of the solubility para

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1992.tb05532.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

摘要:

An improved vibrating‐reed method is described for determining Young's modulus of thin films deposited on both sides of a substrate. This technique consists of measuring the resonant frequency of a cantilever composite beam obtained by coating both sides of a substrate. The calculation procedure is presented to evaluate the film modulus from sample geometry, material density, and mechanical resonant frequency. For accurate determination of resonant frequency, the phase angle between the exciting and vibration signals is analyzed. Using the proposed technique, Young's modulus of ZrO2thin films is calculated, obtaining a value in agreement with literature dat

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1992.tb05533.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1992.tb05534.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY

ISSN:0002-7820    

DOI:10.1111/j.1151-2916.1992.tb05535.x

出版商:Blackwell Publishing Ltd    

年代:1992

数据来源: WILEY