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RISS 인기검색어
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- 저자 : J. Abenojar (검색결과 2 건)
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Sintering Stainless Steels with Boron Addition in Nitrogen Base Atmosphere
Abenojar J.,Esteban D.,Martinez M.A.,Velasco F. 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1
Due to the increasing use that the stainless steel is getting recently in the nuclear industry, this document proposes the study of the stainless steel 316L with boron addition. With the final product, the properties of the stainless steel 316L (good mechanical properties and high corrosion resistance) with the boron neutron absorption properties are claimed to unify. The P/M technologies allow adding higher boron quantities than with the solidification conventional technologies, where segregation is produced.
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B. Enciso,J. Abenojar,E. Paz,M.A. Martínez 한국섬유공학회 2018 Fibers and polymers Vol.19 No.6
The aim of this work is to study the influence of low pressure plasma (LPP) treatment on the durability of thermoplastic composites using flax and coconut fibers as reinforcement. Two different aging conditions were evaluated, high temperature (73 oC) and high temperature plus water immersion. In both cases five aging times (1, 2, 8, 30 and 60 days) were evaluated. Composite materials were prepared with treated and untreated flax and coconut fibers with 30 % of fiber content and a low density polyethylene (LDPE) matrix. Composites were manufactured using a rotor mixer and a hot plates press. The influence of the aging conditions on each type of fiber, flax or coconut, as well as the plasma treatment effect in all composite materials were studied by determining water absorption and mechanical properties. Mechanical properties were assessed by three point bending tests and the water uptake was determined by weight measurements. Thermal properties were also studied by Differential Scanning Calorimetric (DSC) technique. Finally, the liquids where the specimens were submerged in were evaluated by ultraviolet spectroscopy to analyse cellulose or lignin amounts dissolved. In all cases, durability was mainly affected by the humidity but not so much by high temperatures, obtaining better bending strength and Young’s modulus in the LPP treated materials, especially those with flax fiber reinforcement.
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