INVESTIGATION INTO THE TUNGSTEN-RICH REGIONS OF THE BINARY SYSTEMS TUNGSTEN-CARBON, TUNGSTEN-BORON AND TUNGSTEN-BERYLLIUM. PART I. TUNGSTEN-CARBON EQUILIBRIUM SYSTEM
Abstract
The solid-solubility limit of C in W is presented. Numerous highly refined X-ray diffraction, microcopy, and physical test techniques for detecting the solubility limit were explored. The solid solution of C in W is clearly intersitial. C solubility is finite, attaining a maximum of approximately 0.3 atomic % C t the eutectic temperature, decreasing to 0.05 atomic % C near 2000 C and to insignificant amounts at lower temperatures. Thus, precipitation hardening effects should be liable to occur in W-C. The dimorphism of W2C now seems estaished. The normal hexagonal form transforms into a second allotropc (NaCl type) cubic form at a temperature close to the melting point. A marked grain-refining effect by the addition of small amounts of carbon to pure tungsten was observed. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1962
- Accession Number
- AD0275874
Entities
People
- H.j. Goldschmidt
- J.a. Brand