Search results

In this paper, we studied the different content of aramid fiber, aramid pulp, carbon fiber, high silica fiber, mullite fiber, alumina fiber's effect on EPDM inhibitor material.
Aramid pulp can improve ablation resistance of thermal insulation layer, but its dispersion in insulation material is difficult.
Because of its advantages in low density, high decompose temperature and good compatibility with propellant charge EPDM was one of widely used rubber material in inhibitor.
Experimental Materials: EPDM inhibitor: the third monomer is ENB, ethylene quantity percent 59% , I value in ENB is17g/100g, JSR EP25; DCP: quantity percent≥98%, Taicang plastic reagent; aramid fiber: length 3~5mm,aramid pulp: shanghai synthesis fiber institute; high silica fiber: shaanxi huate new material Ltd; carbon fiber: Japan TORAY; mullite fiber: Zhejiang kelei crystal fiber ,Ltd; alumina fiber: Zhejiang OSM crystal fiber Ltd; other materials: chemical pure brought in market.
Aramid polymer and powder filler reinforced elastomeric composition for use as rocket motor insulation .USP 4 492 779,1985-01-08 [2] ZHANG Jin-song, LING Ling, HE Yong-zhu, HUANG Hao-dong Effects of the test conditions on the ablation property of EPDM insulation [J] Journal of Solid Rocket Technology Vol01.27 No.2 2004 121~122 [3] ZHANG Jing–song, LING Ling , ZHU Xue–wei The efects of filler fiber and flam e retardant on ablative performance of EPDM insulation [J] Journal of Solid Rocket Technology V01.25 No.4 2002 38~40 [4] ZHAO Xiao-li, YUE Hong, ZHANG Xing-hang, ZHANG Ying Progress and Prospect of Ablation Resistance of Insulation of EPDM Rubber[J] Journal of Materials Science & Engineering Vol.2 3 No.2 2005 310~312 [5] Li Guijia, Zhang Weiru, Yin Yansheng, Cheng Zhiqiang The Applation of Inorganic Fiber Material in Aviation and Space Thermal-proof System [J] .Ceramic 2004 (2) 28~31

., Faculty of Materials Science and Engineering, University POLITEHNICA of Bucharest, Romania 4 Prof., Faculty of Materials Science and Engineering, University POLITEHNICA of Bucharest, Romania 5 Prof., Faculty of Materials Science and Engineering, University POLITEHNICA of Bucharest, Romania 6 Ph.D student, Faculty of Materials Science and Engineering, University POLITEHNICA of Bucharest, Romania amuna_alanni2008@yahoo.com, bhazimfaleh@yahoo.com, c mchisamera@yahoo.com, dgigelneague@yahoo.com, eflorinstefanescu2001@yahoo.com, fstefan_eduard2000@yahoo.com Keywords: Wear rate, impact, corrosion, tensile strength.
Introduction In the last few decades, research has shifted from monolithic materials to composite materials to meet the global demand for wear and corrosion resistant materials, light weight, high performance, environmental friendly.
The SiCp/Al material, actually a class of materials, has a variety of advantages.
Reduction in the area of selected materials in initial and corroded condition.
Ye, “ An overview of the development of Al-Si alloy based material for engine application”, journal of materials engineering and performance, pp.288-297

Introduction In functionally graded materials, the materials are graded based on applications.
Ha, Volume fraction optimization for minimizing thermal stress in Ni–Al2O3 functionally graded materials, Materials Science and Engineering: A. 334 (2002) 147–155
Steady state creep in a rotating composite disc of variable thickness, International Journal of Materials Research. 101(6) (2010) 780–786
Alexander, Chemical Rubber Company, eds., CRC materials science and engineering handbook, 3rd ed, CRC Press, Boca Raton, Fla., 2001
a review, Journal of Materials Science. 26 (1991) 1137–1156.

In recent years, ultraprecision grinding was researched as a new method used for hard and brittle materials, and the key here is how to realize material removing mostly by ultra-micro cutting and ductile shearing action.
Consequently, for ultraprecision grinding of hard and brittle materials, it’s difficult to identify material removal modes and define surface generating mechanism.
Plastic shearing mechanism of hard and brittle materials in ultraprecision grinding In 1987, a notable hypothesis was putted forward by American scholar T.G.
References [1] B.P.Bandyopadhyay, H.Ohmori and I.Takahashi: Journal of Material Process Technology, Vol.66 (1997), p.18-24 [2] G.
Ohmori: International Journal of Machine Tools & Manufacture, Vol.39 (1999), p.839-853 [5] C.

References [1] Michelle L.Oyen, Robert F.Cook, A practical guide for analysis of nanoindentation data, Journal of the mechanical behavior of biomedical materials. 2(2009)396-407
Peng, Determination of the thickness of titanium films on glass substrate by nanoindentation tests, Journal of Materials Research. 26 (2011) 353-356
[12] Bharat Bhushan, Nanoscale characterization of human hair and hair conditioners, Progress in Materials Science.53(2008)585–710
Berndt, On the size-dependent phase transformation in nanoparticulate zirconia, Materials Science and Engineering.
Schädlich, Nanoindentation hardness of submicrometer alumina ceramics, Materials Science and Engineering.

It is well known that materials of higher strength that are used for lightweight design, such as high alloyed steels and aluminium alloys, frequently show a degraded forming behavior associated to a lower ductility.
Experimental results Materials properties, after the bulk and local (laser) heat treatments, were evaluated by microhardness measurements.
Geiger, Laser Forming of aluminium and aluminium alloys – microstructural investigation, Journal of Materials Processing Technology, 11, pp. 159-165, 2001
Geiger, New materials and production technologies for innovative lightweight constructions, Journal of Materials Processing Technology,Vol. 125–126 , pp. 532–536, 2002
[4] Borge Bjorneklett, Odd Perry Sovik, Ole Runar Myhr, Hallvard Fjaer, Local Thermal Manipulation of aluminium alloys, 2005 TMS Annual Meeting: 6th Global Innovations Symposium Edited by TMS (The Minerals, Metals e Materials Society), 2005.

Alavi: Materials & Design Vol. 187 (2020), p. 108214
Yang: APL Materials Vol. 9(9) (2021), p. 091111 [24] A.
Zhu: Materials Vol. 14 (2021), p. 6882 [28] A.Matin Nazar, K.
Jiao: Journal of Marine Science and Engineering.
Yan: Journal of Materials Chemistry C Vol. 8 (2020) p. 16436 [37] S.V.

It was also observed that all the materials contained a high percentage of hematite (Fe2O3), which gives a reddish color to the ceramic products after firing.
Applied Clay Science. 11, 237-249
Journal of Environmental Engineering. 127 (10), October issue. 922-927
Journal of Environmental Engineering. 113 (2), 278-283
“Utilization of sludge as brick materials”.

Myung: ACS Applied Materials & Interfaces, vol.5(2013), p.11434
Bruce: Advanced Materials, vol.18(2006), p.2330
Sun: Advanced Materials, vol.22(2010), p.4364
Zhou: Journal of Materials Chemistry A, vol.1(2013), p.5301
Zhou: ACS Applied Materials & Interfaces, vol.2 (2010), p.212

Zinc oxide production technology of distillation twice based on scrap miscellaneous zinc materials Liu Qunshan1, a, YanJunxia2,b 1,2Hebei Key Laboratory of Material Near-net Forming Technology, HebeiUniversity of Science and Technology, Shijiazhuang, China aemail:kdclxylqs@sina.com, bemail: yanjx_ann@sina.com Keywords:reused zinc resources; regeneration; scrap miscellaneous zinc materials; fire method; two distillations technology; zinc oxide Abstract: By using scrap miscellaneouszinc materialas raw materials, a new technology with the help of two distillationsby fire method to produce zinc oxide was invented.The scrap miscellaneous zinc materialshave complex sources, containing dust, stone, iron and steel parts and other impurities, and zinc content is more than 15% over a wide range.
Characteristics of scrap miscellaneous zinc materials However, there arealways some scrap miscellaneous zinc materials in industrial production and life.
These wasted materials come from complicated sources and zinc content is in a wide range.
Conclusions (1) The technology is based on scrap miscellaneous zinc materials as raw materials to produce zinc oxide.
The problem of the complex of impurities in raw materials has been solved