Below is the uncorrected machine-read text of this chapter, intended to provide our own search engines and external engines with highly rich, chapter-representative searchable text of each book. Because it is UNCORRECTED material, please consider the following text as a useful but insufficient proxy for the authoritative book pages.
SELECTED APPLICATION AREAS. 97 the other synthesis methods also discussed in Chapters 2 and 3 have the potential for generating similar ultrafine composite structures. MULTILAYER COATINGS. An important structural application of multilayer thin films is as protective coatings for Co-WC cutting tools. A typical composite film comprises three vapor-deposited layers of TiC, TiN, and Al2O3 , each of which performs a specific function that contributes to the overall performance and durability of the cutting tool. The first example of an application of a nanophase-composite coating has inspired much recent activity in the coatings industry to devise and exploit multilayer films for a variety of applications, including protective coatings for mirrors, wear- resistant surfaces on polymers, and low-friction bearings. In this context, particularly intriguing is the low- temperature synthesis of superhard materials such as diamond and cubic BN. An interesting feature of such materials is the inherently nanoscale structure of the deposited films, which themselves are an integral part of a nanoscale architecture. For certain multilayered systems with compatible structures, the possibility exists of generating a strained- layer superlattice that exhibits the supermodulus effect. Exceptionally stiff coatings on stiff substrates have been made for experimental purposes. Potential applications are being considered for producing superstiff coated filaments for reinforcement purposes in composite structures. REFERENCES Cohen, Y., and E. L. Thomas. 1988. Microfibrillator network of a rigid rod polymer: I--Visualization by electron microscopy. Macromolecules 21:433. Croat, J. J., J. F. Herbst, R. W. Lee, and F. E. Pinkerton. 1984a. High-energy product Nd-Fe-B permanent magnets. Appl. Phys. Lett. 44 (1):148â149. Croat, J. J., J. F. Herbst, R. W. Lee, and F. E. Pinkerton. 1984b. Pr-Fe and Nd-Fe-based materials: A new class of high-performance permanent magnets. J. Appl. Phys. 55:2078. Herbst, J. F., J. J. Croat, F. E. Pinkerton, and W. B. Yelon. 1984. Phys. Rev. B. 29:4176. Keem, J. E., G. B. Clements, A. M. Kadin, and R. W. McCallum. 1988. P. 27 in Hard and Soft Magnetic Materials With Applications. Proceedings of a Conference Held in ASM's Materials Week 1987. Metals Park, Ohio: ASM International.
SELECTED APPLICATION AREAS. 98 Koon, N. C., C. M. Williams, and B. N. Das. 1980. 26th Annual Conference on Magnetism and Magnetic Materials, Dallas, Texas, November 11â14. Newnham, R. E., D. P. Skinner, and L. E. Cross. 1978. Mat. Res. Bull. 13:525. Stoner, E. C., and E. P. Wohlfarth. 1948. Philos. Trans. R. Soc. Lond. Ser. A 240:599.
