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Mangeron Blvd, Iasi, Romania 2Technical University of Iasi, Materials Science and Engineering Department, 41 D.Mangeron Blvd, Iasi, Romania ampanturu1967@yahoo.com, b*dchicet@tuiasi.ro, ctiti_paulin@yahoo.com, dlupescustefan@ymail.com, ecornelmun@gmail.com Keywords: TBC, atmospheric plasma spray, internal combustion engines valve.
In this article we analysed the microstructural aspects of some coatings obtained from powders with thermal barrier role on specific materials for internal combustion engines valves.
There were used as substrate samples of low alloy steels with Si and high alloyed steels with Cr, Ni and Mn, which are specific materials for the discs of the intake or exhaust valves.
We can conclude that it is possible to increase the service time of the valve discs using TBC`s, starting from the properties provided by the commercial usual materials.
Earar, Structural modification of α-Ti based alloy after submission to open flame thermal shock, Key Engineering Materials. 638 (2015) 333-338.

Fig.1 Chemical structure of the polymers studied Experimental Materials The synthesis materials acrylamide was provided by Jiangxi Changjiu Chemical industry Co., Ltd.
American Journal of Economics and Sociology, 1982, 41(1): 61-76 [2] Kevin C.
Journal of Petroleum Science and Engineering, 1998, 19(3-4):265-280
Journal of Petroleum Exploration and Production Technology, 2013, 3(1)
[6] Binqiang Xie, Journal of Macromolecular Science, Part A: Pure and Applied Chemistry, 2013, 50(2):230-237

The PHP is made up of brass material with an inner diameter of 1.95mm, with a total length of 1150 mm for different fill ratios (FR) was employed .The PHP is tested for the thermal resistance and the heat transfer coefficient.
The experimental results on three turn closed loop PHP with brass material shows a better performance.
[3] Rittidech, S., Nimkin,S, Effect of Working Fluids and Evaporator Temperatures on Internal Flow Patterns and Heat Transfer Rates of a Top Heat Mode Closed Loop Oscillating Heat Pipe with Check Valves, Australian Journal of Basic and Applied Sciences,Vol. 5(10), 2011, pp. 1013-1019
[5] Khandekar, S., Thermo Hydrodynamics of Pulsating Heat Pipes, PhD Dissertation, University of Stuttgart, Germany, 2004 [6] Faghri A: Heat pipe science and technology, by Taylor & Francis (1995)
Journal of Mass and Heat Transfer Vol.55,2012,pp.1036-1047

PCD tools, especially curve edge PCD compound tools are used widely in machining nonferrous and non-metal materials with high efficiency and precision because of their excellent cutting properties.
Instead of using the mechanical force to break the diamond, the wire EDG uses the thermal energy or electrical sparks between a thin, traveling wire to remove materials [2].
Dewes: Journal of Materials Processing Technology, Vol.155-156 (2004), pp.1227
Xue: Journal of Materials Processing Technology, Vol.116 (2001), pp.165
Aspinwall, etc., Journal of Materials Processing Tech, Vol.56 (1996), pp.773.

Materials and methods Test Materials and preparation of specimens.
Journal of Wood Science, 2001; 47:237--242 [7] Naresworo Nugroho.
Journal of Wood Science, 2000;46:68-74 [8] Guan M J, ZHU, Y.X; ZHAN X.A.
Journal of Wood Science, 2005;51:274-277 [12] Kilic M, Hiziroglu S.
[16] ASTM D 1667-87(Reapproved 1999) Standard methods for conducting machining of wood and wood-Base Materials [17] GB/T 12472.

They found that the low viscous carrier fluids significantly enhance the damage to the pipeline materials as compared to the high viscous flow operating conditions.
Iftikhar, Effect of sand fines concentration on the erosion-corrosion mechanism of carbon steel 90° elbow pipe in slug flow, Materials. 13 (2020) 4601
Bian, Numerical study on the particle erosion of elbows mounted in series in the gas-solid flow, Journal of Natural Gas Science and Engineering. 99 (2022) 104423
Sulaiman, Effect of water-mixed polyvinyl alcohol viscosity on wear response of carbon steel exposed to an eroding medium, Journal of Materials Engineering and Performance. 30 (2021) 2066-2073
Yoshida, Practical estimation of erosion damage caused by solid particle impact: Part 2: Mechanical properties of materials directly associated with erosion damage, Wear. 259 (2005) 102-109

The range of application of capacitive sensors is extraordinary, for example, there are some literatures about measurement of moisture content in some materials by capacitive sensors, see[1,2,3,4].
Single planar capacitance sensor is one of high-precision equipment, which is used to measure the moisture content in some materials.
However, it should be noted that in the current state of research common applications of planar capacitance sensor for monitoring moisture content in all woody materials regardless of their type are not possible yet.
For instance, formulas commonly used in wood block moisture monitoring are mostly not suitable for erose materials.
Luo, et al.: Journal of Beijing Forestry University Vol. 30(4) (2008), p. 17

In order to evaluate the applicability of these materials, a spare tyre compartment cover of a passenger car was investigated to compare with the properties of the fabricated materials.
The mechanical properties of the above materials are tested.
References [1] Nina Graupner, Journal of Composite Materials, Vol. 43, No. 6, 689-702 (2009)
[2] Ruihua Hu, Jae-Kyoo Lim, Journal of Composite Materials, Vol. 41, No. 13, 1655-1669 (2007)
[3] Ruihua Hu, Jae Kyoo Lim, Chul-In Kim Ho-Chel Yoon, Key Engineering Materials Vol. 353-358, 1302-1305(2007)

The textile composite materials involved into all fields of technology today [2].
But the other aspects include the connecting materials and craft are in the same.
Which construction the linking materials are one system of warps yarns, the upper face fabric and lower face fabric are plain weave.
Liu, Performance of 3D textile composite material and its application master paper, Guangxi Textile Science & Technology: 4 (2008) 22-27 [3] G.M.
Nie, Research on honeycomb three dimensional fabrics and its composite material, Progress in Textile Science & Technology: 5 (2007) 5-6

Journal of Materials Processing Technology (2003)142: 676-683
Materials Science and Engineering A (2004)364 : 346-356
[10] A.Barbacki , and M.Kawalec : Structural alterations in the surface layer during hard machining, Journal of Materials Processing Technology 64 (1997), 33 -39
Journal of Materials Processing Technology (2004)148: 362-367
Journal of Materials Processing Technology (2003)142: 163-173.