Effect of particulate additions on the contact damage resistance of hot-pressed Si3N4

Page, R. A.; Blanchard‐Ardid, C. R.; Wei, W.

doi:10.1007/bf01153994

Cited by 21 publications

(7 citation statements)

References 20 publications

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“…2a, it can be seen that in the faces perpendicular to the HP axis, the hardness is lower than in the planes parallel to the pressing direction, because the alignment of the BN platelets during hot-pressing increases the probability of an indentation to cover a larger area fraction of the softer BN. The hardness of the Si 3 N 4 -BN composites produced in the present work, are similar to those measured by Page et al [10] and by Doche et al [5] for the same type of composites, but significantly higher than those obtained by Skopp et al [4], that present values around 2GPa. In Fig.…”

Section: Resultssupporting

confidence: 91%

Mechanical Characterization of Si3N4-BN(pl) Composites

Silva

Carrapichano²,

Oliveira

2002

KEM

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The solid lubrication properties of BN led to the development of Si 3 N 4 -BN composites, aiming the production of self-lubricated high performance materials. Composites containing 10, 18 and 25vol% of hexagonal BN were hot-pressed at 1650°C, 25MPa. The microstructure was characterized by SEM, X-ray diffraction and stereologic image analysis. Vickers indentations were performed to evaluate hardness and indentation fracture toughness. The hardness ranged from H V =12.9GPa to H V =2.1GPa with increasing BN amount. For a given amount of BN, hardness is higher in the surfaces parallel to the hot-pressing direction, as the basal planes of the BN platelets tend to align perpendicularly to this direction. The anisotropy in the microstructure also affects the values of K Ic , since the cracks deflect, aligning themselves with the platelets, or, in some cases, they cannot even propagate. When the propagation direction of the cracks is not perpendicular to the basal planes of the platelets, the fracture toughness does not change significantly with the amount or orientation of BN, having values between K Ic =3.5MPa.m 1/2 and K Ic =5.9MPa.m 1/2 .

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Section: Resultssupporting

confidence: 91%

Mechanical Characterization of Si3N4-BN(pl) Composites

Silva

Carrapichano²,

Oliveira

2002

KEM

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“…[13][14][15][16][17] Nickel titanate coating was applied to surfaces due to its high durability and high resistant to oxidizing atmosphere. 14,18) The present study deals with nickel plating on mild steel specimens modified by surface impregnation of nickel titanate. The prepared nickel plated electrodes were characterized by chemical and electrochemical methods.…”

Section: Introductionmentioning

confidence: 99%

Electroplating of Nickel on Nickel Titanate Modified Mild Steel Surface

Beenakumari¹

2013

J. Electrochem. Sci. Technol

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Nickel is a good electrocatalytic metal and nickel electrodes find many applications in different electrochemical fields. The nickel plated electrodes were prepared by electro-deposition technique on mild steel surface modified with in-situ deposition of nickel titanate. The SEM images shows that the nickel plating on nickel titanate modified mild steel shows better adherence than the nickel plating on bare mild steel surfaces. The extent of polarization of the nickel plating on mild steel with nickel titanate was lower than that of nickel plating on mild steel. The incorporation of nickel titanate on mild steel surface before nickel plating enhances physical, chemical and electrochemical properties of the plating film.

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“…A matrix of Si 3 N 4 was used in these experiments with volumetric additions of TiC, found previously to improve the lubricity and wear resistance of Si'N 4 [8], and SiC whiskers, to provide an increase in mechanical integriey.…”

Section: Bulk Modification: the Composite Approach Experimental Procementioning

confidence: 99%

“…Therefore, alternate material modifications, including surface and bulk treatments, have been developed to attack the problem of high temperature oscillatory contact of ceramic materials [8][9][10][11][12][13][14][15].…”

Section: Introductiormentioning

confidence: 99%

Surface and Bulk Oxidizing Species for Self Lubricating Ceramics

1988

Self Cite

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The use of ceramic materials for high temperature engine applications has prompted interest in the friction and-wear characteristics of ceramicceramic pairs in mating contact. This interest has led to both surface and bulk material modifications aimed at improving the lubricity and wear resistance of these materials.This paper will discuss two basic systems developed to allow self-lubrication at high temperatures in ceramic materials through the formation of a lubricious oxide film.Both methods operate under the assumption that the oxide chemistry of the system controls the lubricity and wear properties.Relevant issues for each system will be presented and discussed. INTRODUCTIOR

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Effect of particulate additions on the contact damage resistance of hot-pressed Si3N4

Cited by 21 publications

References 20 publications

Mechanical Characterization of Si<sub>3</sub>N<sub>4-</sub>BN(pl) Composites

Mechanical Characterization of Si<sub>3</sub>N<sub>4-</sub>BN(pl) Composites

Electroplating of Nickel on Nickel Titanate Modified Mild Steel Surface

Surface and Bulk Oxidizing Species for Self Lubricating Ceramics

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