Tribological Reaction Generated on Ceramic – Steel Couples Under Boundary Lubrication

1990 ◽  
Vol 112 (4) ◽  
pp. 637-642 ◽  
Author(s):  
Y. Tanita ◽  
T. Mine ◽  
K. Nakajima
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Friction And Wear ◽  
Ceramic Surface ◽  
Wear Properties ◽  
Lubricant Oil ◽  
Ceramic Surfaces ◽  
Fe Content ◽  
Friction And Wear Properties ◽  
Constituent Elements

The effect of ZnDTP on Al2O3, Si3C, and Si3N4 surface was investigated with ceramic-steel couples under lubricated conditions. Metal transfer to the ceramic surfaces was found to increase with load and surface roughness, depending on the kind of ceramic. P, S, and Zn as atomic constituent elements of ZnDTP were measured on the ceramic surface in all three types of ceramic-steel couple. The amount of each of these elements deposited increased as the Fe content transferred onto the surfaces increased. Measurements of hardness and fracture toughness were conducted on SiC and Si3N4 in SiC - and Si3N4-steel couples with and without additive to determine changes in mechanical properties of the ceramic surfaces. Further investigations were conducted to determine the effect of the gases, O2 and N2, on friction and wear properties of the Si3N4-steel couple. Saturation of the lubricant oil with O2 and N2 was found to cause an increase of the wear rate at about 100 N in this couple.

Effects of Fe on Friction and Wear Properties of Cu-Based Friction Aterial

2011 ◽  
Vol 194-196 ◽  
pp. 1830-1833 ◽  
Author(s):  
Rong Fu ◽  
Fei Gao ◽  
Bao Yun Song
Keyword(s):  
Friction And Wear ◽  
Convex Bodies ◽  
Thermal Conductance ◽  
Test Machine ◽  
Third Body ◽  
Wear Properties ◽  
Micro Cracks ◽  
Fe Content ◽  
Material Hardness ◽  
Friction And Wear Properties

Cu-Fe sintered material is prepared by PM technique, and the effect of Fe content on friction property of material and the relation between Fe content and the shape of the third body are investivaged by a constant speed friction test machine. The result indicates that as Fe content in the material increased, material density and porosity haven’t changed much, while material hardness obviously increased. When Fe content is about 20%, friction and wear properties are better because the optimum amount of Fe has the function of strengthening matrix. As friction speed increased, friction coefficient reduced; the cause lies in the fact that surface temperature rise reduces the density of Cu matrix and reduces mechanical meshing drag between micro-convex bodies due to poor thermal conductance of Fe. Simultaneously, due to friction alternating stress, rigid and fragile third body with advanced oxidization generates micro cracks, and the micro cracks continuously expand, and finally drop off; thus, the wear rate is increased.

Investigation on the Fabrication and Properties of the Cu Base Friction Composites

2020 ◽  
Vol 984 ◽  
pp. 125-130 ◽  
Author(s):  
Tian Guo Wang ◽  
X.Y. Liu ◽  
J.J. Hua
Keyword(s):  
Powder Metallurgy ◽  
Friction Coefficient ◽  
Wear Rate ◽  
Friction And Wear ◽  
Frictional Property ◽  
Wear Properties ◽  
Friction Materials ◽  
Friction Factors ◽  
Fe Content ◽  
Friction And Wear Properties

Cu-based friction materials were prepared by powder metallurgy technology. The effect of Fe content on friction and wear properties of Cu-based friction materials has been investigated. The results indicate that Fe content has great effects on the wear ability of Cu-based friction materials. Fe works as frictional component in copper-based friction materials, influening the mechanical and frictional property of materials. With increasing Fe content, the hardness and friction coefficient of Cu-based friction materials stability increase, the wear rate of the friction materials decreases. When Fe content is 6%, the materials posses stably high friction factors, as well as good wear ability.

Friction and Wear Properties of αAlB12-NiAl Cermet Prepared by Spark Plasma Sintering

2016 ◽  
Vol 879 ◽  
pp. 1338-1343
Author(s):  
Takashi Murakami ◽  
Haruyuki Inui
Keyword(s):  
Fracture Toughness ◽  
Spark Plasma Sintering ◽  
Friction And Wear ◽  
Knoop Hardness ◽  
Wear Properties ◽  
Wear Rates ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Friction And Wear Properties ◽  
Nial Powder

In this study, αAlB12-20vol% NiAl cermet disk specimens were prepared by spark plasma sintering, and their microstructure, Knoop hardness, fracture toughness, and friction and wear properties were investigated. The αAlB12-20vol% NiAl disk specimens were obtained by spark plasma sintering blended αAlB12 and NiAl powder at 1573 K for 600 seconds. No reaction product phases were observed between the αAlB12 and NiAl phases. The αAlB12-20vol% NiAl disk specimens exhibited friction coefficients lower than 0.2 and specific wear rates as low as 1.3 × 10-6 mm3/Nm when sliding against Si3N4 ball specimens in water. O-rich phases were observed on the worn surfaces of the NiAl and αAlB12-20vol% NiAl disk specimens after sliding against Si3N4 ball specimens in water. The Knoop hardness of the disk specimens was as high as 10 GPa and the fracture toughness was as high as 7 MPa m1/2.

Tribological Design of Zirconia Nanocomposite Ceramic Tool and Die Material

2011 ◽  
Vol 697-698 ◽  
pp. 142-146 ◽  
Author(s):  
Ming Dong Yi ◽  
Chong Hai Xu ◽  
X.H. Wang ◽  
Hui Fa Zhang
Keyword(s):  
Mechanical Properties ◽  
Friction And Wear ◽  
Composite Ceramic ◽  
Ceramic Tool ◽  
Wear Properties ◽  
Nano Composite ◽  
Die Materials ◽  
Die Material ◽  
Friction And Wear Properties ◽  
Pressing Technology

A new ZrO2 nano-composite ceramic tool and die material was prepared with vacuum hot pressing technology. The friction and wear behaviors of ZrO2 nano-composite ceramic tool and die materials in sliding against 45 chilled steel rings under dry friction were investigated by using an MMW-1A abrasion wear tester. The mechanical properties and the friction and wear properties of the composites with various compositions and contents were studied. It is indicated that the changing trends of the wear rate and the mechanical properties of the composites with the change of TiB2 and Al2O3 contents are roughly the same, but the friction coefficient is not obviously. The friction and wear properties and the mechanical properties are finer when the TiB2 and Al2O3 content is both 10%.

Friction and wear properties of an automobile brake lining reinforced by lignin fiber and glass fiber

2017 ◽  
Vol 69 (5) ◽  
pp. 775-781 ◽  
Author(s):  
Wang Chengmin ◽  
Yang Xuefeng ◽  
Cai Xiguang ◽  
Ma Tao ◽  
Li Yunxi ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Glass Fiber ◽  
Friction And Wear ◽  
Wear Properties ◽  
Fatigue Wear ◽  
Friction Materials ◽  
Content Type ◽  
Friction Testing ◽  
Friction And Wear Properties ◽  
Brake Lining

Purpose This paper aims to thrash out friction and wear properties of automobile brake lining reinforced by lignin fiber and glass fiber in braking process. Design/methodology/approach ABAQUS finite element software was used to analyze thermo-mechanical coupled field of friction materials. XD-MSM constant speed friction testing machine was used to test friction and wear properties of friction material. Worn surface morphology and mechanism of friction materials were observed by using scanning electron microscope. Findings The results show that when the temperature was below 350°C, worn mechanism of MFBL was mainly fatigue wear and abrasive wear, and worn mechanism of GFBL was mainly fatigue wear because MFBL contained lignin fiber. Therefore, it exhibits better mechanical properties and friction and wear properties than those of GFBL. Originality/value Lignin fiber can improve mechanical properties and friction and wear properties of the automobile brake lining.

Frication and Wear Properties of Cu-Fe-Al Composite Containing Graphite Prepared by Induction Sintering

2010 ◽  
Vol 160-162 ◽  
pp. 1050-1055
Author(s):  
Chuan Qi Fu ◽  
Zhou Wang
Keyword(s):  
Mechanical Properties ◽  
Friction And Wear ◽  
Wear Properties ◽  
Mechanical And Tribological Properties ◽  
Al Composite ◽  
Porous Microstructure ◽  
Friction And Wear Properties ◽  
Surface Morphologies ◽  
Worn Surface ◽  
Sintering Method

Cu-Fe-Al composites containing various amounts of graphite additives are prepared by induction sintering method. The mechanical properties of the composites with 0-8 wt. % graphite are measured using the mechanical tester, while the friction and wear properties are evaluated using MRH-3 friction-wear tester. Material components are found by EDS. The worn surface morphologies of the composites are analyzed by means of scanning electron microscopy (SEM). The experimental results show that the composite containing graphite have porous microstructure. The mechanical and tribological properties of composites are related to the induction frequencies and the contents of the graphite as the solid lubricant. The increased graphite content results in reduced mechanical properties and increased friction and wear properties. The composite with 4 wt. % graphite additives and induction frequencies of 35Hz have the lower the friction coefficients and wear rate. Meanwhile, wear mechanism of materials have been changed from abrasive wear to grain wear due to the glaze layer.

Friction and Wear Properties of Oriented Fe2B with Different Cr Additions under Water-Lubricated Condition

2020 ◽  
Vol 975 ◽  
pp. 3-8
Author(s):  
Ke Min Li ◽  
Zhi Fu Huang ◽  
Chao Feng Qin ◽  
Han Wen Ma ◽  
Wei Yao Zhang
Keyword(s):  
Fracture Toughness ◽  
Friction Coefficient ◽  
Cross Section ◽  
Laser Scanning ◽  
Friction And Wear ◽  
Longitudinal Section ◽  
Wear Loss ◽  
Wear Properties ◽  
Cr Addition ◽  
Friction And Wear Properties

In the present study, pure oriented Fe2B with Cr addition were prepared. The friction and wear properties of oriented Fe2B with different Cr additions were investigated by optical microscopy, scanning electron microscopy and 3D laser scanning microscope. Results indicate that fracture toughness of the cross section is higher than that of the longitudinal section invariably with the same Cr addition. Both cross and longitudinal sections, the fracture toughness value increases from 1Cr to 2Cr and decreases from 2Cr to 3Cr. Friction coefficient and wear loss of cross section are lower than those of the longitudinal section under the same Cr addition. For the identical grain orientation, the friction coefficient and wear loss rise from 1Cr to 2Cr and then drop from 2Cr to 3Cr. 2Cr-C sample has the lowest friction coefficient and wear loss. On the contrary, the friction coefficient and wear loss of 3Cr-L sample are the highest. Wear mechanisms of Fe2B alloy are brittle rupture and abrasive wear.

Study on the Friction and Wear Properties of Yttrium-Stabilized Zirconia Based Nanocomposite Ceramic Tool and Die Materials

2010 ◽  
Vol 154-155 ◽  
pp. 1366-1370 ◽  
Author(s):  
Chong Hai Xu ◽  
Guang Yong Wu ◽  
Yong Lian Zhang ◽  
Rong Bo Zhang
Keyword(s):  
Mechanical Properties ◽  
Wear Mechanisms ◽  
Friction And Wear ◽  
Single Phase ◽  
Cutting Tool ◽  
Ceramic Materials ◽  
Ceramic Tool ◽  
Wear Properties ◽  
Die Materials ◽  
Friction And Wear Properties

Based on the requirements for ceramic materials of cutting tool and die and the aim of improving comprehensive mechanical properties of ceramic tool and die materials, nanocomposite ceramic tool and die materials with high mechanical properties were fabricated successfully with nanometer composite method. Friction and wear properties of the developed ZrO2/Ti(C7N3) nanocomposite ceramic tool and die materials were experimentally studied in detail. Morphologies of the worn surfaces were observed and analyzed by ESEM. Wear mechanisms of nanocomposite ceramic tool and die materials were discussed with comparison with that of single-phase ZrO2 ceramics. It indicates that wear mechanisms of ZrO2/Ti(C7N3) nanocomposite ceramic tool and die materials are mechanical cold welding, abrasive wear and adhesive wear.

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