Structure and Properties of B4C
20 Citations. Explore all metrics. Abstract. We have investigated how the composition, grain morphology, and method of preparing the starting mixture affect the processes that form …
20 Citations. Explore all metrics. Abstract. We have investigated how the composition, grain morphology, and method of preparing the starting mixture affect the processes that form …
Abstract: SiC/B 4 C composite was obtained by reaction sintering with Si infiltration, and the effects of carbon content on mechanical properties and the microstructure were investigated. The results showed that the mechanical properties of the SiC/B 4 C composite improved firstly and then worsened with increasing carbon content. The optimum comprehensive …
Abstract Effect of hybridization on the rate-dependent behaviour of Aluminum metal matrix composites (MMCs) comprising (0, 10, 20, and 30%) monolithic and hybrid SiC–B4C were prepared by powder metallurgy technique and tested under quasi-static and dynamic compression. Split Hopkinson pressure bar results revealed diverse strain rates …
Abstract. In the present research, SiC–B 4 C nano powders were synthesized through sol–gel process in water–solvent–catalyst–dispersant system. In order to evaluate the formation mechanism of the product during sol-gel process, TEM, SEM, DTA/TG, BET, XRD, FTIR and DLS analysis methods were employed. The nanometric size of precursor ...
پودرهای کاربید سیلیکون برای فرآیندهای ماشینکاری ساینده مانند سنگ زنی، سندبلاست و برش با جت آب استفاده می شود. SiC را می توان در کاغذ، پارچه یا چوب لمینیت کرد تا چسبندگی اصطکاکی ایجاد کند.
روشی برای بازیافت پودر SIC از ضایعات ،که 100% اجرایی شده و به تولید انبوه رسیده است، قطعاتی که در بوته های ذوب و در دوغاب ساینده یا ضایعات مربوط به قطعات کاربید سیلیکون است که از نظر محیط زیست ...
SiC-B4C composites with various values of SiC-to-B4C ratio and grain size were fabricated by pressureless sintering. This paper presents the results of current investigations of this composite material. This includes the parameters of manufacture (shrinkage, density, and open porosity), thermoelectric properties (electrical and thermal …
Boron carbide (B 4 C) ceramic composites with excellent mechanical properties were fabricated by hot-pressing using B 4 C, silicon carbide (SiC), titanium boride (TiB 2), and magnesium aluminum silicate (MAS) as raw materials.The influences of SiC and TiB 2 content on the microstructural evolution and mechanical properties of the …
17 Citations. Explore all metrics. Abstract. A novel B 4 C–SiC composite aerogel is synthesized using nano boron carbide suspension, 3 …
Almost fully-dense B 4 C–SiC–TiB 2 composites with a high combination of strength and toughness were prepared through in situ reactive spark plasma sintering using B 4 C and TiSi 2 as raw materials. The densification, microstructure, mechanical properties, reaction, and toughening mechanisms were explored. TiSi 2 was confirmed as a reactive …
We fabricated boron carbide-silicon carbide (B 4 C–SiC) composites by hot-press sintering without additives and evaluated the crystal phase, relative density, …
While outstanding properties of boron carbide (B 4 C)-silicon carbide (SiC) composites make them potential candidates for ballistic and wear resistance …
The nano hardness, Vickers hardness, and Young's modulus of 12 vol% B4C compared with 12 vol% of SiC are increased by 12%, 23%, and 16%, respectively, and the same trend has been observed for the ...
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A novel B4C–SiC composite aerogel is synthesized using nano boron carbide suspension, 3-aminopropyltriethoxysilane (APTES), and resorcinol–formaldehyde (RF) as precursors through the sol–gel route and carbothermal reduction process. The effects of different B/Si molar ratios and calcination temperatures on the physical …
SiC + 2 O 2 → 2 SiO 2 + C O 2 ↑. The most critical parameters for producing foamed glass-ceramics are the softening range of glass, the viscosity of the glass melt and the gas release temperature of the foaming agent. The optimal viscosity of glass melt during the foaming process should in the range of 10 3.3-10 4.0 Pa·s if SiC is used as ...
از پودرهای کاربید بور می توان برای کاربردهای سرامیکی با پیوند داغ ، فشرده گرم یا پخت استفاده کرد. ... کاربید بور با مشخصات فدراسیون تولیدکنندگان اروپایی محصولات ساینده (FEPA) مطابقت دارد: F100 (150/106 ...
The contribution of TiB2 to the microstructure, elastic and mechanical properties of B 4 C-SiC composites were investigated. The highest hardness was measured to be 29.5 GPa with 15 wt%TiB 2 addition. The highest fracture toughness was 3.08 MPa.m 1/2 found at sample made with 10 wt% TiB 2. Addition of 10 wt% TiB 2 increased the …
Characterization of B4C-SiC ceramic composites prepared by ultra-high pressure sintering @article{Matovi2021CharacterizationOB, title={Characterization of B4C-SiC ceramic composites prepared by ultra-high pressure sintering}, author={Branko Matovi{'c} and Jelena Maletaskic and Tatiana Prikhna and Vladimir S. Urbanovich and …
The B 4 C-SiC composites were obtained through densification of B 4 C and β-SiC powders with different ratios using Spark Plasma Sintering (SPS). Thermal treatment was conducted in the 1850–2000 °C temperature range under pressure of 70 MPa. Starting powder ratio effect on sintering behavior, relative density, microstructural development ...
حامد روغنی مجری این طرح در گفتگو با خبرنگار فناوری‌های نوین باشگاه خبرنگاران گفت: نانوکامپوزیت SiC-B4C به روش سنتز خود احتراقی فعال شده مکانیکی در صنایع دفاعی و هسته‌ای، ابزار برش و مواد ساینده کاربرد دارد.
The oxidation property of SiC-B 4 C-xAl 2 O 3 (x ranges from 0 wt% to 30 wt%) ceramics was studied in air at 1400 ℃. Results show that the porous oxide layer becomes dense and smooth with addition of Al 2 O 3.When the content of Al 2 O 3 is proper, the DOP (degree of polymerization) of borosilicate network can be improved with …
XRD pattern of the B 4 C modified HfB 2-SiC coating is observed from Fig. 2, this coating includes SiC, HfB 2, B 4 C and Si four phases. Excessive silicon powders lead to the appearance of the Si diffraction peak [30].Because Si has low melting point and was molten state at the preparation temperature, the viscosity of the whole composite system …
Under the condition of strong bonding between SiC grains and B 4 C grains, the SiC-B 4 C ceramic composites with higher porosity can obtain better tribological properties. In addition, it is observed by AFM that the depth of scratch on B 4 C grains is shallower than that on SiC grains. Hence, it is demonstrated by micro scale …
To improve the mechanical properties and tribological characteristics of boron carbide (B 4 C) ceramic, silicon carbide (SiC) as an incorporation phase was …
The microstructure and mechanical properties of an MMC based on AA 7075 and strengthened through silicon carbide (SiC) as well as boron carbide (B4C) elements were studied. The (SiC + B4C ...
B4C–SiC composite ceramics exhibit a combination of the desirable performance of B4C and SiC, making them a better candidate material for engineering applications as structural ceramic materials.
In the present study aluminium metal matrix composites (Al-MMCs) reinforced with different Wt% (2,3,4,5 and 6) of Silicon carbide (SiC) and hybrid composites of aluminium matrix reinforced with different Wt% (2,3,4,5 and 6) of SiC and constantly adding Boron carbide (B4C) with 2 wt% were fabricated using a cost effective powder …
پرداخت کاری با استفاده ازمیدان مغناطیسی در مقیاس نانو nmaf، روشی جدید برای پرداخت کاری با زبری سطح در حد نانو بصورت فرآیند مکانیکی بوده و از طریق سایش پودر ذرات ساینده بعنوان ابزار، در فرآیندnmaf میباشد، نیروی مورد نیاز ...
The C/C–SiC disc was prepared by chemical vapor infiltration (C 3 H 6 used as carbon source, the deposition temperature was 980 ℃, the deposition time was 250–450 h) combined with liquid silicon infiltration (in vacuum environment, 1600 ℃ for 1.5 h). The density, hardness and open porosity of the prepared C/C-SiC disc were approximately …