بلک, زهره
[ 1 ] - بررسی تأثیر هافنیوم دی بوراید بر ریزساختار کامپوزیتهای پایه ZrB2 سینتر شده به روش SPS
سینتر با جرقه پلاسما (SPS) فرآیندی است که طی سال‌های اخیر برای سرامیک‌های فوق دما بالا به کار گرفته می شود. در این پژوهش کامپوزیتهای پایه ZrB2 با درصدهای مختلف HfB2 (Vol 15%-0) با استفاده از فرآیند SPS در دماها (1600- 1900)، زمانها (min 8-4) و فشارهای (MPa 40-10) سینتر شدند. به علاوه تأثیر MoSi2 بر نفوذ Hf در Zr مورد بررسی قرار گرفت. به منظور ارزیابی ریزساختار و نوع فازهای تشکیل شده بررسیهای...
[ 2 ] - Studying the Effects of Nano Sintering Additives on Microstructure and Electrical Properties of Potassium-Sodium Niobate Piezoceramics
In this paper, lead free (K0.48,Na0.52)NbO3 (KNN(48-52)) piezoelectric ceramics were made by conventional solid state sintering process. Additives of nano ZnO (n-ZnO), nano CuO (n-CuO) and nano SnO2 (n-SnO2) were used in order to decrease the sintering temperature, as well as modifying the dielectric, piezoelectric and ferroelectric propert...
[ 3 ] - Oxidation of ZrB2-SiC Composites at 1600 °C: Effect of Carbides, Borides, Silicides, and Chopped Carbon Fiber
The aim of this work is to optimize the oxidation resistance of ZrB2-SiC-based composites with different additives. Effect of nine factors including SiC, Cf, MoSi2, HfB2 and ZrC contents, milling time of Cf (M.t) and SPS parameters such as temperature, time and pressure on oxidation resistance in four levels was investigated. Taguchi design was applied to explore effective parameters for ...
[ 4 ] - Investigation of Effective Parameters on Densification of ZrB2-SiC Based Composites Using Taguchi Method
Abstract The main goal of this study is optimization of densification of ZrB2-SiC composites reinforced with chopped Cf prepared by SPS. Taguchi method is employed as statistical design of experiment (DOE) to optimize densification parameters including SiC, Cf, MoSi2, HfB2 and ZrC content, milling time of Cf and SPS parameters such as temperature, time and pressure. Each of these factors ...
[ 5 ] - Effect of the Primary Microstructures during Training Producers on TWSME in NiTi Alloys (TECHNICAL NOTE)
The influence of the martensitic, martensitic+austenitic and austenitic structures in bending training on two-way shape memory effect (TWSME) in Ni-50.8 at %Ti and Ni-49.9 at %Ti alloys was studied. In addition of the primary structure, the effect of pre-strain, plastic strain, training cycle and training temperature on the TWSME was investigated. The prepared samples were trained in martensiti...
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