scholarly journals Friction and Wear Properties of CrAl-Based Coatings for Nuclear Fuel Cladding

2021 ◽  
Vol 9 ◽  
Author(s):  
Biao Ma ◽  
Bin Luo ◽  
Zhuozheng Wang ◽  
Chuiyi Meng ◽  
Xiujie He
Keyword(s):  
Friction And Wear ◽  
Wear Behavior ◽  
Water Environment ◽  
Wear Depth ◽  
Fuel Cladding ◽  
Wear Properties ◽  
Wear Performance ◽  
Al Content ◽  
The Coefficient Of Friction ◽  
Wear Tests

Friction and wear performance is one of the key mechanical properties of accident tolerant fuel cladding coatings. In this study, reciprocating sliding wear tests had performed on two types of CrAl and CrAlN coatings with two different Al content ratios and Zr-4. The coefficient of friction, wear depth, and abrasion loss were measured and compared. The results indicated that the CrAl-based coatings improve the wear behavior significantly and nitrogen has an obvious improvement on the wear resistance of the coating. The friction and wear performance was also studied in a water environment. The results show that the presence of water degrade the wear performance of Zr-4 and CrAl coatings but ameliorates the friction and wear performance of CrAlN coatings. The feasibility of depositing ATF coating on conventional Zr-4 substrates to mitigate the influence of grid-to-rod fretting was demonstrated.

Friction and Wear Characteristics of Magneto-Rheological Elastomers Based on Silicone/Polyurethane Hybrid

2015 ◽  
Vol 137 (3) ◽  
Author(s):  
Chenglong Lian ◽  
Kwang-Hee Lee ◽  
Chul-Hee Lee
Keyword(s):  
Friction And Wear ◽  
Matrix Material ◽  
Operating Conditions ◽  
Wear Depth ◽  
Test Results ◽  
Wear Properties ◽  
Wear Performance ◽  
Friction And Wear Properties ◽  
Magneto Rheological ◽  
Mr Effect

The friction and wear properties of four different types of magneto-rheological (MR) elastomer were investigated. The MR elastomers have different matrix materials and structures. Most MR elastomers have a silicone matrix, since it has a more significant MR effect under a magnetic field compared to other materials. The mechanical properties of silicone, however, are poor compared to other materials, so it is difficult to use them in engineering applications. Therefore, a new polyurethane matrix material was used to enhance the friction and wear properties of MR elastomer. Additionally, two different matrix materials (silicone and polyurethane) were synthesized, and MR elastomers were structurally combined to improve the friction and wear performance. The friction characteristics of each MR elastomer were evaluated under reciprocating operating conditions. Wear depth was also measured to estimate the wear resistance. The test results show that the friction and wear performance of the modified MR elastomers are enhanced compared with the silicone-based MR elastomer.

Orthogonal tests of the lubricating performance of SnO2 nanoparticles in poly-alfa-olefine oil

2021 ◽  
pp. 135065012110377
Author(s):  
Bing-Xu Wang ◽  
Fan Wu ◽  
Xiuming Zhang ◽  
Yongfeng Yuan ◽  
Shaoyi Guo ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Normal Load ◽  
Sno2 Nanoparticles ◽  
Protective Layer ◽  
Wear Loss ◽  
Wear Depth ◽  
Shearing Resistance ◽  
The Coefficient Of Friction ◽  
Orthogonal Tests ◽  
Wear Tests

The tribological properties of SnO2 nanofluids were investigated using ball-on-plate reciprocating sliding wear tests. It was found that the coefficient of friction was reduced by 34.9% using 3 wt% SnO2 nanoparticles. The wear width and wear depth were reduced by 42% and 50.1%, respectively, using 2 wt% SnO2 nanoparticles. In the orthogonal tests, the frequency had the greatest influence on the friction and wear loss. Additionally, the optimal working conditions were a normal load of 50 N, a motion frequency of 1 Hz, and a surface roughness of 500–600 nm. Additionally, the excellent tribological performance of SnO2 nanofluids could be attributed to the formation of a tribo-film with a low shearing resistance due to the oleic acid and a protective layer due to the embedment of SnO2 nanoparticles.

Dry sliding friction and wear behavior of self-lubricating wollastonite filled polycarbonate composites

2015 ◽  
Vol 67 (1) ◽  
pp. 22-29 ◽  
Author(s):  
Akin Akinci
Keyword(s):  
Wear Rate ◽  
Friction And Wear ◽  
Sliding Friction ◽  
Wear Behavior ◽  
Xrd Analysis ◽  
Dry Sliding ◽  
Wear Performance ◽  
Content Type ◽  
Wear Rates ◽  
Wear Tests

Purpose – The purpose of this paper is to investigate the friction and wear performance of pure polycarbonate (PC) and 5-30 per cent wollastonite-filled (by weight) PC were comparatively evaluated under dry sliding conditions. Wear tests were carried out at room temperature under the loads of 5-20 N and at the sliding speeds of 0.5-1.5 m/s. Design/methodology/approach – The microstructures of the wollastonite, pure PC and composites were examined by optical microscopy, scanning electron microscopy, energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD) analysis. The friction and wear tests were realized using a pin-on-disk arrangement against the hardened AISI 4140 steel. Findings – The result of this study indicated that the coefficients of friction wear rate of the materials were significantly influenced by an increase in wollastonite content. The friction coefficient of the PC was getting decreased from 0.457 to 0.198 with an increase in wollastonite content, depending on applied loads and sliding speeds. On the other hand, the results showed that the wear rates of pure PC and wollastonite-filled PCs decreased with an increase in loads. The wear rate of the PC decreased from 1.2 × 10−6 to 8.7 × 10−6 mm3/m with an increase in wollastonite content, depending on applied loads. Originality/value – There are many reports which deal with the friction and wear performance of the polymers and polymer composites. However, the effect of wollastonite effect on tribological performance of PC has up to now not been extensively researched.

Study of Friction and Wear Behavior of C/C Composite under Electrical Sliding

2015 ◽  
Vol 642 ◽  
pp. 19-23
Author(s):  
Shang Guan Bao ◽  
Yi Fan Wang ◽  
Zhen Hai Yang ◽  
Yong Zhen Zhang ◽  
Yue Chen ◽  
...  
Keyword(s):  
Wear Rate ◽  
Electric Current ◽  
Coefficient Of Friction ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Friction Couple ◽  
Wear Properties ◽  
Arc Erosion ◽  
Frictional Wear ◽  
The Coefficient Of Friction

Using C/C composite and chrome bronze as a friction couple, the frictional wear properties of C/C composite with electric current is studied in this paper. The results have shown that current, velocity and load are important factors to affect the frictional wear properties of C/C composite with electric current. Wear rate of C/C composite increases with the increase of arc energy .The coefficient of friction and the wear rate increase with the increase of velocity when the electric current is constant of 100A. The coefficient of friction increases but the wear rate decreases with the increase of load when the electric current is constant at 100A. The coefficient of friction decreases but the wear rate increases with the increase of current when the load is constant of 80N. Comparing with no electric current, the coefficient of friction of C/C composite with electric current decreases but the wear rate of that increases obviously. The wear mechanism of C/C composite is mainly of electric wear caused by arc erosion under the condition of current-carrying.

scholarly journals Tribological performance and scuffing behaviors of several automobile piston rings mating with chrome-plated cylinder liner

Friction ◽  
2021 ◽  
Author(s):  
Zeyu Ma ◽  
Ruoxuan Huang ◽  
Xiaoshuai Yuan ◽  
Yan Shen ◽  
Jiujun Xu
Keyword(s):  
Friction Force ◽  
Friction And Wear ◽  
Wear Behavior ◽  
Cylinder Liner ◽  
Wear Loss ◽  
Wear Properties ◽  
Dlc Coating ◽  
Lubricant Oil ◽  
Short Period ◽  
Wear Tests

AbstractThe friction and wear properties, as well as the scuffing resistance, of different piston-ring coatings mating with a chrome-plated cylinder liner were investigated. Interrupted wear tests under the lubricant starvation condition were conducted to examine the wear behavior of Cr-diamond coating (GDC) and diamond-like coating (DLC). The results indicated that the DLC coating had outstanding tribological properties (small coefficient of friction and wear loss) at 150 °C, while the GDC coating exhibited better performance at an elevated temperature (240 °C). The DLC coating had a better scuffing resistance; no material adhesion occurred for 70 min under the unlubricated condition. The interrupted wear behaviors revealed that the scuffing process of the GDC coating involved the consumption of lubricant oil with relatively stable wear, a reduction in the friction force, and the occurrence of scuffing, in sequence. In contrast, although the friction force also increased after a short period of weak friction, no scuffing was observed. This is attributed to the formation of a mixed oxide and graphitic C tribolayer.

scholarly journals Dry Sliding Friction Analysis and Wear Behavior of Carbon Nanotubes / Vinylester Nanocomposites, Using Pin-on-Disc Test

2019 ◽  
Vol 70 (10) ◽  
pp. 3592-3596
Keyword(s):  
Carbon Nanotubes ◽  
Friction And Wear ◽  
Sliding Friction ◽  
Wear Behavior ◽  
Dry Sliding ◽  
Wear Properties ◽  
Test Parameters ◽  
Pin On Disc ◽  
The Coefficient Of Friction ◽  
Dry Sliding Friction

Dry sliding friction and wear behavior of single-wall (SW) and multi-wall (MW) carbon nanotubes (CNTs)/ vinylester composite have been investigated, under several loads and sliding speeds. Three different contents (0.1, 0.15 and 0.2 wt. %) of SWCNT and MWCNTs have been dispersed into the vinylester resin in order to obtain polymer nanocomposites. The present study discusses the coefficient of friction, specific wear rate and friction stability of vinylester composites with different CNTs content, using a pin-on-disc test. The friction and wear experiments were carried out following 3 loads×3 speeds, as test parameters. The best combination of friction and wear properties was found with the nanocomposite containing 0.2 wt.% MWCNT. Keywords: carbon nanotubes, vinylester, friction, wear

scholarly journals Tribological behavior of Ti-6Al-4V and Ti-6Al-7Nb Alloys for Total Hip Prosthesis

2014 ◽  
Vol 2014 ◽  
pp. 1-13 ◽  
Author(s):  
Mamoun Fellah ◽  
Mohamed Labaïz ◽  
Omar Assala ◽  
Leila Dekhil ◽  
Ahlem Taleb ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Hip Prosthesis ◽  
Tribological Behavior ◽  
Wear Behavior ◽  
Femoral Stem ◽  
High Strength ◽  
Wear Performance ◽  
Grain Structures ◽  
Pin On Disc ◽  
Wear Tests

The aim of the study is to evaluate the friction and wear behavior of high-strength alloys Ti-6Al-7Nb used in femoral stem and compare it with a Ti-6Al-4V alloy cylindrical bar corresponding to ISO 5832-3 part 3/01-07-199 standard. The tribological behavior was investigated by wear tests, using ball-on-disc and pin-on-disc tribometers. These tests consisted of measuring the weight loss and the friction coefficient of samples. The oscillating friction and wear tests have been carried out in ambient with oscillating tribotester in accordance with standards ISO 7148, ASTM G99-95a, and ASTM G133-95 under different conditions of normal loads (3, 6, and 10 N) and sliding speeds (1, 15, and 25 mm·s−1). As counter pairs, a 100Cr6 steel ball with 10 mm in diameter was used. Results show that the two alloys had similar friction and wear performance, although their grain structures and compositions are different. Occurrence of large frictional occurred, is probably caused by formation and periodic, localized fracture of a transfer layer. Higher friction with larger fluctuation and higher wear rate was observed at the higher siding speed. The Ti-6Al-4V wear mechanism transforms from ploughing and peeling off wear at low sliding speed to plastic deformation and adhesive wear.

scholarly journals Dry Sliding Friction Analysis and Wear Behavior of Carbon Nanotubes / Vinylester Nanocomposites, Using Pin-on-Disc Test

2019 ◽  
Vol 70 (10) ◽  
pp. 3592-3596
Author(s):  
Adrian Cotet ◽  
Marian Bastiurea ◽  
Gabriel Andrei ◽  
Alina Cantaragiu ◽  
Anton Hadar
Keyword(s):  
Carbon Nanotubes ◽  
Friction And Wear ◽  
Sliding Friction ◽  
Wear Behavior ◽  
Dry Sliding ◽  
Wear Properties ◽  
Test Parameters ◽  
Pin On Disc ◽  
The Coefficient Of Friction ◽  
Dry Sliding Friction

Dry sliding friction and wear behavior of single-wall (SW) and multi-wall (MW) carbon nanotubes (CNTs)/ vinylester composite have been investigated, under several loads and sliding speeds. Three different contents (0.1, 0.15 and 0.2 wt. %) of SWCNT and MWCNTs have been dispersed into the vinylester resin in order to obtain polymer nanocomposites. The present study discusses the coefficient of friction, specific wear rate and friction stability of vinylester composites with different CNTs content, using a pin-on-disc test. The friction and wear experiments were carried out following 3 loads�3 speeds, as test parameters. The best combination of friction and wear properties was found with the nanocomposite containing 0.2 wt.% MWCNT.

High-Temperature Wear Mechanisms of a Severely Plastic Deformed Al/Mg2Si Composite

2018 ◽  
Vol 141 (3) ◽  
Author(s):  
Mahsa Ebrahimi ◽  
Abbas Zarei-Hanzaki ◽  
A. H. Shafieizad ◽  
Michaela Šlapáková ◽  
Parya Teymoory
Keyword(s):  
Plastic Deformation ◽  
Room Temperature ◽  
Wear Behavior ◽  
Normal Load ◽  
Aluminum Matrix ◽  
Hardened Layer ◽  
Dry Sliding Wear ◽  
Wear Properties ◽  
Wear Performance ◽  
Processed Material

The present work was primarily conducted to study the wear behavior of as-received and severely deformed Al-15%Mg2Si in situ composites. The severe plastic deformation was applied using accumulative back extrusion (ABE) technique (one and three passes). The continuous dynamic recrystallization (CDRX) was recognized as the main strain accommodation and grain refinement mechanism within aluminum matrix during ABE cycles. To investigate the wear properties of the processed material, the dry sliding wear tests were carried out on both the as-received and processed samples under normal load of 10 and 20 N at room temperature, 100 °C, and 200 °C. The results indicated a better wear resistance of processed specimens in comparison to the as-received ones at room temperature. In addition, the wear performance was improved as the ABE pass numbers increased. These were related to the presence of oxide tribolayer. At 100 °C, the as-received material exhibited a better wear performance compared to the processed material; this was attributed to the formation of a work-hardened layer on the worn surface. At 200 °C, both the as-received and processed composites experienced a severe wear condition. In general, elevating the temperature changed the dominant wear mechanism from oxidation and delamination at room temperature to severe adhesion and plastic deformation at 200 °C.

Metallic reinforcements role on aluminum silicon composites wear behavior

2016 ◽  
Vol 51 (19) ◽  
pp. 2805-2812 ◽  
Author(s):  
G Miranda ◽  
M Buciumeanu ◽  
MM Costa ◽  
F Bartolomeu ◽  
FS Silva ◽  
...  
Keyword(s):  
Cast Iron ◽  
Gray Cast Iron ◽  
Wear Behavior ◽  
Microstructural Characterization ◽  
Gray Cast ◽  
Wear Performance ◽  
Particulate Reinforced Composites ◽  
Particulate Reinforced ◽  
Wear Tests ◽  
Aluminum Silicon

This study is concerned with the influence of four metallic reinforcements on aluminum-silicon (AlSi) composites, with respect to wear behavior. AlSi-Ti; AlSi-Ti6Al4V; AlSi-1.4301 stainless steel and AlSi-Ni particulate reinforced composites were produced by a hot-pressing route. Microstructural characterization showed a uniform distribution of the reinforcing particles in the AlSi matrix. Reciprocating pin-on-plate wear tests were performed for AlSi and AlSi-based composites against gray cast iron plates. In order to compare the effect of different metallic particulates on the AlSi-based composites/gray cast iron tribopair wear performance, besides the pin, the counterface was also analyzed. The particle/matrix interface is analyzed in order to understand its influence on the tribopair behavior and on the controlling wear mechanisms. It was shown that the better compromise between both sliding surfaces performance was attained by AlSi-Ni/gray cast iron tribopair.

Sign in / Sign up

Export Citation Format

Share Document