Fatigue limit and crack arrest in alkali-containing silicate glasses

Gehrke, E.; Ullner, Christian; Hähnert, M.

doi:10.1007/bf02403942

Cited by 74 publications

(117 citation statements)

References 16 publications

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“…Thus, no matter how small the stress on the crack tip in pure silica, the crack will always propagate. On the other hand, alkali glasses do, in general, have an environmental limit [1,3,4,54]. Lawn [41] links the delayed onset of crack propagation to a shielding zone which encompasses the crack tip.…”

Section: 31mentioning

confidence: 99%

“…Thus, the physical properties of the glass and the crack front within this shielding zone (or process zone, PZ) dictate the glass response to an external stress. The environmental limit, K e , is known to depend on the glass chemical composition [1,3,4,54]. There are several mechanisms proposed in literature to explain variations in K e :…”

Section: 31mentioning

confidence: 99%

“…2. Hydronium-Na + exchange causes a compression in the PZ due to the larger size of the hydronium ions [54][55][56]. 3.…”

Section: 31mentioning

confidence: 99%

“…4. Variations in the pH at the crack tip [54,[57][58][59] For nearly 50 years, scientists have debated the fundamental mechanisms leading to K e , yet conclusive first principle explanations remain elusive. Frequently, they choose one or two of the explanations above and ignore the underline structure of the glass.…”

Section: 31mentioning

confidence: 99%

“…This is due to excess energy provided by the stress [1,2,54,151]. This energy sink aids in delaying the onset of crack propagation, thus giving rise to a critical environmental stress intensity factor.…”

Section: Examination Of the Shift In K E With Chemicalmentioning

confidence: 99%

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Recent progress to understand stress corrosion cracking in sodium borosilicate glasses: linking the chemical composition to structural, physical and fracture properties

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés. Recent IntroductionOxide glasses are among the oldest industrial materials known to man, and they are widely used due to their advantageous properties: transparency, low thermal expansion, high melting point temperature, relative inertness, etc. Yet, oxide glasses are not without significant shortcomings. In par ticular, they remain inherently brittle, despite significant scientific ingenuity to overcome this drawback. Moreover, they undergo abrupt catastrophic failure. Frequently, post-mortem failure studies reveal material flaws which were propagating via stress corrosion cracking. Understanding and predicting the growth of such flaws under sub-critical crack propagation remains a hurdle for scientists. Furthermore, how the basic glass network (i.e. the interconnect of the glass structure) dictates the physical, mechanical and stress corrosion cracking AbstractThis topical review is dedicated to understanding stress corrosion cracking in oxide glasses and specifically the SiO 2 B 2 O 3 Na 2 O (SBN) ternary glass systems. Many review papers already exist on the topic of stress corrosion cracking in complex oxide glasses or overly simplified glasses (pure silica). These papers look at how systematically controlling environmental factors (pH, temperature...) alter stress corrosion cracking, while maintaining the same type of glass sample. Many questions still exist, including: What sets the environmental limit? What sets the velocity versus stress intensity factor in the slow stress corrosion regime (Region I)? Can researchers optimize these two effects to enhance a glass' resistance to failure? To help answer these questions, this review takes a different approach. It looks at how systemically controlling the glass' chemical composition alters the structure and physical properties. These changes are then compared and contrasted to the fracture toughness and the stress corrosion cracking properties. By taking this holistic approach, researchers can begin to understand the controlling factors in stress corrosion cracking and how to optimize glasses via the initial chemical composition.

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