فهرست مقالات Nano powder

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  1 - Synthesis of B4C - Nano TiB2 Composite Nano Powder by the Chemical Precipitation Method
  M. Saeedi Heydari H. R. Baharvandi
  The aim of this research is to determine the proper concentration of Titanium Tetra IsoPropoxide (TTIP) and select the right temperature and time of calcinations for the synthesis of B4C-nano TiB2 composite Nano powder by the chemical precipitation method. For this purp چکیده کامل

  The aim of this research is to determine the proper concentration of Titanium Tetra IsoPropoxide (TTIP) and select the right temperature and time of calcinations for the synthesis of B4C-nano TiB2 composite Nano powder by the chemical precipitation method. For this purpose, first, solutions with TTIP molar concentrations of 0.1, 0.05 and 0.03 were prepared and the optimal molar concentration of TTIP was determined to be 0.05. Then, a diluted solution of distilled water and TTIP was mixed with Isopropanol Alcohol containing B4C micropowder. In this mixture, Titanium Hydroxide nanoparticles were initially synthesized and then, to convert the Ti(OH)4 to TiB2, the above mixture were calcined in a furnace, under Argon atmosphere. The calcination process was carried out at temperatures of 750, 1000 and 1250 ºC. It was observed that the most suitable temperature for the formation of the TiB2 phase is 1250 ºC and that the lower temperatures only lead to the formation of the TiO2 phase. It was also observed that, at the calcination temperature of 1250 ºC, the most appropriate time duration for the conversion of Ti(OH)4 nanoparticles to TiB2 nanoparticles is 30 minutes, during which B4C-nano TiB2 composite Nano powders form, with most of the TiB2 particle sizes being in the range of 30-60 nm. پرونده مقاله
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  2 - Ti-6Al-4V Synthesized by Mechanical Alloy Method and Mechanical and Bioactivity Properties of Ti-6Al-4V/HA-Clay Nano composite
  محمدعلی مطلبی ابراهیم کرمیان مجید کریمیان
  Nowadays, titanium-based alloys are among the most attractive metallic materials for biomedical applications (as implants) due to their non-biodegradability, low density, good mechanical properties as well as their good biocompatibility. Hydroxyapatite (Ca10 (PO4)6(OH)2 چکیده کامل

  Nowadays, titanium-based alloys are among the most attractive metallic materials for biomedical applications (as implants) due to their non-biodegradability, low density, good mechanical properties as well as their good biocompatibility. Hydroxyapatite (Ca10 (PO4)6(OH)2, HA) has been widely used for biomedical applications due to its bioactive, biocompatible and osteoconductive properties. Firstly, Ti-6Al-4V alloy was synthesized by mechanical alloy method with high energy ball milling plantery, HEBM. And then in this work began with preparing hydroxyapatite, HA, from bovine bones and continued with composite in nano clay powder .At the end a hydroxyapatite–clay (HA/Clay) nanocomposite ceramic, 80 wt.% of HA and 20 wt.% nano clay powder, was synthesized through a mechanical method , HEBM. The ability of apatite formation on the produced nanocomposite samples, as a yardstick for evaluation of the bioactivity, was estimated by using simulated body fluid. According to the results obtained mechanical and density values and bioactivity behavior, the sample containing 20 wt. % HA/Clay indicated the optimal properties in mechanical and bioactivity behavior. In fact, this nano composite sample, Ti-6Al-4V/20 HA-clay, is good candidate for medical purposes, bone tissue applications. پرونده مقاله