FRICTION AND WEAR RESPONSE OF TiB2-B4C CERAMICS

Microstructure of spark plasma sintered TiB2 and TiB2–AlN ceramics

In this research study, the effects of aluminum nitride (AlN) additive on the densification behavior and microstructure development of titanium diboride (TiB2) based ceramic matrix composite were investigated. In this way, a monolithic TiB2 ceramic and a TiB2–5 wt% AlN ultrahigh temperature ceramic composite were fabricated by spark plasma sintering (SPS) proces...

A Fundamental Review of the Friction and Wear Behavior of Ceramics

Hardness and friction of N: and Al+ implanted B4C

Surfaces of boron carbide (B4C) were implanted with 200 keV N: or 100 keV AI + ions to a dose of 8 x 10” cm‘. Ultralow load indentation via the Nanoindenter was used to determine the changes in surface hardness and elastic modulus following implantation. A pin-on-disk testing device in ultrahigh vacuum was used for measuring changes in friction and wear of the implanted disks. Results of hardne...

سنتز نانوکامپوزیت‌های TiB2-B4C به روش مکانوشیمیایی

در این پژوهش، امکان سنتز نانوکامپوزیت­های TiB2-B4C به روش مکانوشیمیایی در سیستم B-C-Ti مورد مطالعه قرار گرفت. مخلوط این پودرها در نسبت استوکیومتری مشخص توزین شده و در مدت زمان­های 6، 10، 14، 20، 26، 32، 50 و 70 ساعت مورد فرآیند آسیاکاری قرار گرفت. به منظور تکمیل واکنش­ها نمونه­ها در دمای °C 800 تا °C1200 به مدت 1 ساعت مورد عملیات حرارتی قرار گرفتند. مطالعات مورفولوژیکی توسط میکروسکوپ الکترونی ر...

Nanoscale friction and wear maps.

Friction and wear are part and parcel of all walks of life, and for interfaces that are in close or near contact, tribology and mechanics are supremely important. They can critically influence the efficient functioning of devices and components. Nanoscale friction force follows a complex nonlinear dependence on multiple, often interdependent, interfacial and material properties. Various studies...