Results 101 to 110 of about 5,825 (220)
Techniques for increasing boron fiber fracture strain [PDF]
Improvement in the strain-to-failure of CVD boron fibers is shown possible by contracting the tungsten boride core region and its inherent flaws. The results of three methods are presented in which etching and thermal processing techniques were employed ...
Dicarlo, J. A.
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Borlama Süresinin Düşük Karbonlu Mikro Alaşımlı Çeliklerin Sertlik Değerleri Üzerine Etkisi
Süleyman Demirel Üniversitesi Fen-Edebiyat Fakültesi Fen Dergisi, 2014 Özet: Bu çalışmada, borlanan düşük karbonlu çeliklerin sertlik değerleri ölçülmüştür. Borlama işlemi 1123 K sıcaklıkta ve değişik sürelerde ticari ekabor-II tozları kullanılarak gerçekleştirilmiştir.
Nursen TURKU +3 more
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Boride layer growth kinetics of the borided high alloyed steels
, 2015 In this study, the case properties and diffusion kinetics of high alloyed cold work tool steel borided in Ekabor-2 powder were investigated by conducting a series of experi-ments at temperatures of 1123, 1173 and 1223 K for 2, 4 and 6 h. The boride layer was characterised by optical microscopy, X-ray diffraction technique and micro-Vickers hardness ...
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Scanning Tunneling Spectroscopy in MgB2
, 2001 We present scanning tunneling microscopy measurements of the surface of superconducting MgB2 with a critical temperature of 39K. In zero magnetic field the conductance spectra can be analyzed in terms of the standard BCS theory with a smearing parameter ...
D. C. Larbalestier +18 more
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Residual stresses in boron/tungsten and boron/carbon fibers [PDF]
By measuring the change in fracture stress of 203 micrometer diameter fibers of boron on tungsten (B/W) as a function of fiber diameter as reduced by chemical etching, it is shown that the flaws which limit B/W fiber strength are located at the surface ...
Behrendt, D. R.
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, 2008 Density functional theory calculations have been used to identify stable layered Li-$M$-B crystal structure phases derived from a recently proposed binary metal-sandwich (MS) lithium monoboride superconductor. We show that the MS lithium monoboride gains
A. M. Fogg +7 more
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Determining boride layer thicknesses formed on XC38 steel with artificial neural network
Zaštita MaterijalaBoride layers result from surface treatments of materials, offering valuable mechanical and tribological aspects that extend the material's life expectancy and potential.
Yassine El Guerri, Bendaoud Mebarek
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Journal of Advanced Materials in Engineering, 2019 In this study, mechanism and kinetic of formation of boride layer on In-738 superalloy were investigated via diffusion pack cementation method. Boriding was carried out at 900 °C for several short times (5, 15, 45 and 60 min).
H. Esfahani +3 more
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The effect of the borosintering process in iron-based materials on abrasive and sliding wear
Revista de MetalurgiaBoriding is usually performed separately after sintering in powder metallurgy methods. In the borosintering process, sintering and boriding processes are carried out simultaneously. This saves energy as it shortens the heat treatment time. Additionally,
Lutuf Ertürk, Burhan Selçuk
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Effect of surface attrition on the microstructure and wear properties of boronized grade 304 stainless steel / Siti Khadijah Alias [PDF]
, 2017 Grade 304 stainless steel has an excellent strength to weight ratio and high corrosion resistance; unfortunately it possesses very poor wear resistance. The structure of this type of stainless steel is austenitic and cannot be heat treated.
Alias, Siti Khadijah
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